diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index 61a6eb5d17..1307f907a3 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -16394,8 +16394,24 @@ maxumum->maximum
 mayu->may
 mazilla->Mozilla
 mccarthyst->mccarthyist
+mchanic->mechanic
+mchanical->mechanical
+mchanically->mechanically
+mchanicals->mechanicals
 mchanics->mechanics
+mchanism->mechanism
+mchanisms->mechanisms
+mcroscope->microscope
+mcroscopes->microscopes
+mcroscopic->microscopic
+mcroscopies->microscopies
+mcroscopy->microscopy
 mdoel->model
+mdoeled->modeled
+mdoeling->modeling
+mdoelled->modelled
+mdoelling->modelling
+mdoels->models
 meachanism->mechanism
 meachanisms->mechanisms
 meachinism->mechanism
@@ -16611,14 +16627,24 @@ mial->mail
 mices->mice
 Michagan->Michigan
 micorcode->microcode
+micorcodes->microcodes
 Micorsoft->Microsoft
+micoscope->microscope
+micoscopes->microscopes
+micoscopic->microscopic
+micoscopies->microscopies
 micoscopy->microscopy
 Micosoft->Microsoft
 Microfost->Microsoft
 micropone->microphone
+micropones->microphones
 microprocesspr->microprocessor
+microprocessprs->microprocessors
+microseond->microsecond
+microseonds->microseconds
 Microsft->Microsoft
 microship->microchip
+microships->microchips
 Microsof->Microsoft
 Microsofot->Microsoft
 Micrsft->Microsoft
@@ -16654,10 +16680,13 @@ millenialism->millennialism
 millenials->millennials
 millenium->millennium
 millepede->millipede
+milliescond->millisecond
 milliesconds->milliseconds
 millioniare->millionaire
+millioniares->millionaires
 millisencond->millisecond
 millisenconds->milliseconds
+milliseond->millisecond
 milliseonds->milliseconds
 millitant->militant
 millitary->military
@@ -16824,6 +16853,19 @@ mmbers->members
 mmnemonic->mnemonic
 mnay->many
 mobify->modify
+mocrochip->microchip
+mocrochips->microchips
+mocrocode->microcode
+mocrocodes->microcodes
+mocrocontroller->microcontroller
+mocrocontrollers->microcontrollers
+mocrophone->microphone
+mocrophones->microphones
+mocroprocessor->microprocessor
+mocroprocessors->microprocessors
+mocrosecond->microsecond
+mocroseconds->microseconds
+Mocrosoft->Microsoft
 mocule->module
 mocules->modules
 moddels->models
@@ -17154,6 +17196,8 @@ nams->names
 nane->name
 nanosencond->nanosecond
 nanosenconds->nanoseconds
+nanoseond->nanosecond
+nanoseonds->nanoseconds
 Naploeon->Napoleon
 Napolean->Napoleon
 Napoleonian->Napoleonic
@@ -19263,6 +19307,8 @@ phyton->python
 phy_interace->phy_interface
 piblisher->publisher
 pich->pitch
+picoseond->picosecond
+picoseonds->picoseconds
 pilgrimmage->pilgrimage
 pilgrimmages->pilgrimages
 pimxap->pixmap
@@ -23175,6 +23221,8 @@ sentinals->sentinels
 sentive->sensitive
 sentively->sensitively, sensitivity,
 sentivite->sensitive
+seond->second, send,
+seonds->seconds, sends,
 sepaate->separate
 separartor->separator
 separat->separate
@@ -26052,6 +26100,10 @@ timne->time
 timoeut->timeout
 timout->timeout
 timtout->timeout
+timzeone->timezone
+timzeones->timezones
+timzezone->timezone
+timzezones->timezones
 tinterrupts->interrupts
 tiome->time, tome,
 tipe->type, tip,
diff --git a/codespell_lib/data/dictionary_en-GB_to_en-US.txt b/codespell_lib/data/dictionary_en-GB_to_en-US.txt
index bd93c413c8..a3f93f1c91 100644
--- a/codespell_lib/data/dictionary_en-GB_to_en-US.txt
+++ b/codespell_lib/data/dictionary_en-GB_to_en-US.txt
@@ -50,6 +50,8 @@ millimetres->millimeters
 minimise->minimize
 minimising->minimizing
 mitre->miter
+modelled->modeled
+modelling->modeling
 mould->mold
 organisation->organization
 prioritise->prioritize