diff --git a/CHANGELOG.md b/CHANGELOG.md
index ec6657942a1d..ccb05f3128e3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -63,6 +63,7 @@ older clients.
 
 ### API Breaking Changes
 
+* (modules) [\#6564](https://github.com/cosmos/cosmos-sdk/pull/6564) Constant `DefaultParamspace` is removed from all modules, use ModuleName instead.
 * (client) [\#6525](https://github.com/cosmos/cosmos-sdk/pull/6525) Removed support for `indent` in JSON responses. Clients should consider piping to an external tool such as `jq`.
 * (x/staking) [\#6451](https://github.com/cosmos/cosmos-sdk/pull/6451) `DefaultParamspace` and `ParamKeyTable` in staking module are moved from keeper to types to enforce consistency.
 * [\#6409](https://github.com/cosmos/cosmos-sdk/pull/6409) Rename all IsEmpty methods to Empty across the codebase and enforce consistency.
diff --git a/simapp/app.go b/simapp/app.go
index 343bf89de4d9..0ecc4dbf4341 100644
--- a/simapp/app.go
+++ b/simapp/app.go
@@ -139,9 +139,6 @@ type SimApp struct {
 	tkeys   map[string]*sdk.TransientStoreKey
 	memKeys map[string]*sdk.MemoryStoreKey
 
-	// subspaces
-	subspaces map[string]paramstypes.Subspace
-
 	// keepers
 	AccountKeeper    authkeeper.AccountKeeper
 	BankKeeper       bankkeeper.Keeper
@@ -199,19 +196,9 @@ func NewSimApp(
 		keys:           keys,
 		tkeys:          tkeys,
 		memKeys:        memKeys,
-		subspaces:      make(map[string]paramstypes.Subspace),
 	}
 
-	// init params keeper and subspaces
-	app.ParamsKeeper = paramskeeper.NewKeeper(appCodec, keys[paramstypes.StoreKey], tkeys[paramstypes.TStoreKey])
-	app.subspaces[authtypes.ModuleName] = app.ParamsKeeper.Subspace(authtypes.DefaultParamspace)
-	app.subspaces[banktypes.ModuleName] = app.ParamsKeeper.Subspace(banktypes.DefaultParamspace)
-	app.subspaces[stakingtypes.ModuleName] = app.ParamsKeeper.Subspace(stakingtypes.DefaultParamspace)
-	app.subspaces[minttypes.ModuleName] = app.ParamsKeeper.Subspace(minttypes.DefaultParamspace)
-	app.subspaces[distrtypes.ModuleName] = app.ParamsKeeper.Subspace(distrtypes.DefaultParamspace)
-	app.subspaces[slashingtypes.ModuleName] = app.ParamsKeeper.Subspace(slashingtypes.DefaultParamspace)
-	app.subspaces[govtypes.ModuleName] = app.ParamsKeeper.Subspace(govtypes.DefaultParamspace).WithKeyTable(govtypes.ParamKeyTable())
-	app.subspaces[crisistypes.ModuleName] = app.ParamsKeeper.Subspace(crisistypes.DefaultParamspace)
+	app.ParamsKeeper = initParamsKeeper(appCodec, keys[paramstypes.StoreKey], tkeys[paramstypes.TStoreKey])
 
 	// set the BaseApp's parameter store
 	bApp.SetParamStore(app.ParamsKeeper.Subspace(baseapp.Paramspace).WithKeyTable(std.ConsensusParamsKeyTable()))
@@ -223,27 +210,27 @@ func NewSimApp(
 
 	// add keepers
 	app.AccountKeeper = authkeeper.NewAccountKeeper(
-		appCodec, keys[authtypes.StoreKey], app.subspaces[authtypes.ModuleName], authtypes.ProtoBaseAccount, maccPerms,
+		appCodec, keys[authtypes.StoreKey], app.GetSubspace(authtypes.ModuleName), authtypes.ProtoBaseAccount, maccPerms,
 	)
 	app.BankKeeper = bankkeeper.NewBaseKeeper(
-		appCodec, keys[banktypes.StoreKey], app.AccountKeeper, app.subspaces[banktypes.ModuleName], app.BlockedAddrs(),
+		appCodec, keys[banktypes.StoreKey], app.AccountKeeper, app.GetSubspace(banktypes.ModuleName), app.BlockedAddrs(),
 	)
 	stakingKeeper := stakingkeeper.NewKeeper(
-		appCodec, keys[stakingtypes.StoreKey], app.AccountKeeper, app.BankKeeper, app.subspaces[stakingtypes.ModuleName],
+		appCodec, keys[stakingtypes.StoreKey], app.AccountKeeper, app.BankKeeper, app.GetSubspace(stakingtypes.ModuleName),
 	)
 	app.MintKeeper = mintkeeper.NewKeeper(
-		appCodec, keys[minttypes.StoreKey], app.subspaces[minttypes.ModuleName], &stakingKeeper,
+		appCodec, keys[minttypes.StoreKey], app.GetSubspace(minttypes.ModuleName), &stakingKeeper,
 		app.AccountKeeper, app.BankKeeper, authtypes.FeeCollectorName,
 	)
 	app.DistrKeeper = distrkeeper.NewKeeper(
-		appCodec, keys[distrtypes.StoreKey], app.subspaces[distrtypes.ModuleName], app.AccountKeeper, app.BankKeeper,
+		appCodec, keys[distrtypes.StoreKey], app.GetSubspace(distrtypes.ModuleName), app.AccountKeeper, app.BankKeeper,
 		&stakingKeeper, authtypes.FeeCollectorName, app.ModuleAccountAddrs(),
 	)
 	app.SlashingKeeper = slashingkeeper.NewKeeper(
-		appCodec, keys[slashingtypes.StoreKey], &stakingKeeper, app.subspaces[slashingtypes.ModuleName],
+		appCodec, keys[slashingtypes.StoreKey], &stakingKeeper, app.GetSubspace(slashingtypes.ModuleName),
 	)
 	app.CrisisKeeper = crisiskeeper.NewKeeper(
-		app.subspaces[crisistypes.ModuleName], invCheckPeriod, app.BankKeeper, authtypes.FeeCollectorName,
+		app.GetSubspace(crisistypes.ModuleName), invCheckPeriod, app.BankKeeper, authtypes.FeeCollectorName,
 	)
 	app.UpgradeKeeper = upgradekeeper.NewKeeper(skipUpgradeHeights, keys[upgradetypes.StoreKey], appCodec, homePath)
 
@@ -254,7 +241,7 @@ func NewSimApp(
 		AddRoute(distrtypes.RouterKey, distr.NewCommunityPoolSpendProposalHandler(app.DistrKeeper)).
 		AddRoute(upgradetypes.RouterKey, upgrade.NewSoftwareUpgradeProposalHandler(app.UpgradeKeeper))
 	app.GovKeeper = govkeeper.NewKeeper(
-		appCodec, keys[govtypes.StoreKey], app.subspaces[govtypes.ModuleName], app.AccountKeeper, app.BankKeeper,
+		appCodec, keys[govtypes.StoreKey], app.GetSubspace(govtypes.ModuleName), app.AccountKeeper, app.BankKeeper,
 		&stakingKeeper, govRouter,
 	)
 
@@ -494,7 +481,8 @@ func (app *SimApp) GetMemKey(storeKey string) *sdk.MemoryStoreKey {
 //
 // NOTE: This is solely to be used for testing purposes.
 func (app *SimApp) GetSubspace(moduleName string) paramstypes.Subspace {
-	return app.subspaces[moduleName]
+	subspace, _ := app.ParamsKeeper.GetSubspace(moduleName)
+	return subspace
 }
 
 // SimulationManager implements the SimulationApp interface
@@ -518,3 +506,19 @@ func GetMaccPerms() map[string][]string {
 	}
 	return dupMaccPerms
 }
+
+// initParamsKeeper init params keeper and its subspaces
+func initParamsKeeper(appCodec codec.Marshaler, key, tkey sdk.StoreKey) paramskeeper.Keeper {
+	paramsKeeper := paramskeeper.NewKeeper(appCodec, key, tkey)
+
+	paramsKeeper.Subspace(authtypes.ModuleName)
+	paramsKeeper.Subspace(banktypes.ModuleName)
+	paramsKeeper.Subspace(stakingtypes.ModuleName)
+	paramsKeeper.Subspace(minttypes.ModuleName)
+	paramsKeeper.Subspace(distrtypes.ModuleName)
+	paramsKeeper.Subspace(slashingtypes.ModuleName)
+	paramsKeeper.Subspace(govtypes.ModuleName).WithKeyTable(govtypes.ParamKeyTable())
+	paramsKeeper.Subspace(crisistypes.ModuleName)
+
+	return paramsKeeper
+}
diff --git a/x/auth/types/params.go b/x/auth/types/params.go
index 4ab97eefd996..710ee963b4a3 100644
--- a/x/auth/types/params.go
+++ b/x/auth/types/params.go
@@ -8,9 +8,6 @@ import (
 	paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
 )
 
-// DefaultParamspace defines the default auth module parameter subspace
-const DefaultParamspace = ModuleName
-
 // Default parameter values
 const (
 	DefaultMaxMemoCharacters      uint64 = 256
diff --git a/x/bank/types/params.go b/x/bank/types/params.go
index 68a8fcd49864..e7fda4ee286c 100644
--- a/x/bank/types/params.go
+++ b/x/bank/types/params.go
@@ -7,8 +7,6 @@ import (
 )
 
 const (
-	// DefaultParamspace for params keeper
-	DefaultParamspace = ModuleName
 	// DefaultSendEnabled enabled
 	DefaultSendEnabled = true
 )
diff --git a/x/crisis/types/params.go b/x/crisis/types/params.go
index 90aacd98ad24..880f350f117c 100644
--- a/x/crisis/types/params.go
+++ b/x/crisis/types/params.go
@@ -7,11 +7,6 @@ import (
 	paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
 )
 
-// Default parameter namespace
-const (
-	DefaultParamspace = ModuleName
-)
-
 var (
 	// key for constant fee parameter
 	ParamStoreKeyConstantFee = []byte("ConstantFee")
diff --git a/x/distribution/types/params.go b/x/distribution/types/params.go
index 33b6b2ca20cc..0cea1814feb9 100644
--- a/x/distribution/types/params.go
+++ b/x/distribution/types/params.go
@@ -9,11 +9,6 @@ import (
 	paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
 )
 
-const (
-	// default paramspace for params keeper
-	DefaultParamspace = ModuleName
-)
-
 // Parameter keys
 var (
 	ParamStoreKeyCommunityTax        = []byte("communitytax")
diff --git a/x/evidence/doc.go b/x/evidence/doc.go
index 23fd4c9aed01..20f907a3b790 100644
--- a/x/evidence/doc.go
+++ b/x/evidence/doc.go
@@ -21,7 +21,7 @@ A full setup of the evidence module may look something as follows:
 	)
 
 	// First, create the keeper's subspace for parameters and the keeper itself.
-	evidenceParamspace := app.ParamsKeeper.Subspace(evidence.DefaultParamspace)
+	evidenceParamspace := app.ParamsKeeper.Subspace(evidence.ModuleName)
 	evidenceKeeper := evidence.NewKeeper(
 	  app.cdc, keys[evidence.StoreKey], evidenceParamspace, evidence.DefaultCodespace,
 	)
diff --git a/x/gov/types/keys.go b/x/gov/types/keys.go
index 98f6f0d88c14..7681116fc46a 100644
--- a/x/gov/types/keys.go
+++ b/x/gov/types/keys.go
@@ -20,9 +20,6 @@ const (
 
 	// QuerierRoute is the querier route for gov
 	QuerierRoute = ModuleName
-
-	// DefaultParamspace default name for parameter store
-	DefaultParamspace = ModuleName
 )
 
 // Keys for governance store
diff --git a/x/mint/types/keys.go b/x/mint/types/keys.go
index 29b21ce4e8e6..e1c778744f81 100644
--- a/x/mint/types/keys.go
+++ b/x/mint/types/keys.go
@@ -7,9 +7,6 @@ const (
 	// module name
 	ModuleName = "mint"
 
-	// default paramspace for params keeper
-	DefaultParamspace = ModuleName
-
 	// StoreKey is the default store key for mint
 	StoreKey = ModuleName
 
diff --git a/x/slashing/types/params.go b/x/slashing/types/params.go
index 8499efdbac1f..c2fd8448244c 100644
--- a/x/slashing/types/params.go
+++ b/x/slashing/types/params.go
@@ -10,7 +10,6 @@ import (
 
 // Default parameter namespace
 const (
-	DefaultParamspace           = ModuleName
 	DefaultSignedBlocksWindow   = int64(100)
 	DefaultDowntimeJailDuration = 60 * 10 * time.Second
 )
diff --git a/x/staking/types/params.go b/x/staking/types/params.go
index 3e2c02ac0527..c2bf32c657b2 100644
--- a/x/staking/types/params.go
+++ b/x/staking/types/params.go
@@ -15,9 +15,6 @@ import (
 
 // Staking params default values
 const (
-	// Default parameter namespace
-	DefaultParamspace = ModuleName
-
 	// DefaultUnbondingTime reflects three weeks in seconds as the default
 	// unbonding time.
 	// TODO: Justify our choice of default here.