diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index 4aa351f..581fe6f 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -24,6 +24,7 @@
 absance->absence
 abscence->absence
 abselutely->absolutely
+abselutly->absolutely
 absense->absence
 absolutly->absolutely
 absorbsion->absorption
@@ -71,7 +72,7 @@
 accompanyed->accompanied
 accordeon->accordion
 accordian->accordion
-accoring->according
+accoring->according, occurring,
 accoustic->acoustic
 accquainted->acquainted
 accrediation->accreditation
@@ -79,6 +80,7 @@
 accross->across
 accussed->accused
 acedemic->academic
+aceptable->acceptable
 acerage->acreage
 acess->access
 acheive->achieve
@@ -386,6 +388,7 @@
 appeareance->appearance
 appearence->appearance
 appearences->appearances
+appeciate->appreciate
 appeneded->appended
 appenines->apennines, Apennines,
 apperance->appearance
@@ -518,6 +521,7 @@
 assignement->assignment
 assignemnt->assignment
 assignend->assigned
+assignes->assigns
 assisnate->assassinate
 assit->assist
 assitant->assistant
@@ -693,6 +697,7 @@
 beteen->between
 bettery->better
 betwen->between
+bever->never
 bevore->before
 beween->between
 bewteen->between
@@ -765,6 +770,8 @@
 calander->calendar, calender, colander,
 calcualte->calculate
 calcualting->calculating
+calculatable->calculatable, calculable,
+calculatble->calculatable, calculable,
 calculater->calculator
 calculs->calculus
 calender->calendar
@@ -1133,6 +1140,7 @@
 conatining->containing
 conceed->concede
 concensus->consensus
+concerntrating->concentrating
 concider->consider
 concidered->considered
 concidering->considering
@@ -1160,6 +1168,7 @@
 confidental->confidential
 confidentally->confidentially
 confids->confides
+configuation->configuration
 configureable->configurable
 confimred->confirmed
 confortable->comfortable
@@ -1304,6 +1313,8 @@
 coresponding->corresponding
 coridal->cordial
 cornmitted->committed
+corordinate->coordinate
+corordinates->coordinates
 corosbonding->corresponding
 corosion->corrosion
 corparate->corporate
@@ -1637,6 +1648,7 @@
 discribed->described
 discribes->describes
 discribing->describing
+discription->description
 disctinction->distinction
 disctinctive->distinctive
 disemination->dissemination
@@ -1738,6 +1750,7 @@
 druming->drumming
 drummless->drumless
 dstination->destination
+dublicate->duplicate
 dulicate->duplicate
 dum->dumb
 dupicate->duplicate
@@ -1785,6 +1798,7 @@
 elegible->eligible
 elemenet->element
 elemenets->elements
+elemens->elements
 elementay->elementary
 elemente->element, elements,
 elemetn->element
@@ -2388,6 +2402,7 @@
 heared->heard
 heathy->healthy
 Heidelburg->Heidelberg
+heigest->highest
 heigher->higher
 heirachies->hierarchies
 heirarchy->hierarchy
@@ -2503,9 +2518,11 @@
 ideosyncratic->idiosyncratic
 idesa->ideas, ides,
 idiosyncracy->idiosyncrasy
+iff->if
 iff->if, disabled due to valid mathematical concept
 ignorence->ignorance
 Ihaca->Ithaca
+iif->if
 illegimacy->illegitimacy
 illegitmate->illegitimate
 illess->illness
@@ -2794,6 +2811,7 @@
 introsepection->introspection
 intruction->instruction
 intruduced->introduced
+intruducing->introducing
 intrument->instrument
 intrumental->instrumental
 intruments->instruments
@@ -3330,6 +3348,7 @@
 nutritent->nutrient
 nutritents->nutrients
 nuturing->nurturing
+obect->object
 obediance->obedience
 obediant->obedient
 obession->obsession
@@ -3413,6 +3432,7 @@
 omniverously->omnivorously
 omre->more
 onot->note, not,
+ons->owns
 onyl->only
 opbjects->objects
 openess->openness
@@ -3554,6 +3574,7 @@
 pass-thru->pass-through, pass through, passthrough,
 pass-trough->pass-through, pass through, passthrough,
 passerbys->passersby
+passiv->passive
 passtime->pasttime
 pasteing->pasting
 pasttime->pastime
@@ -3784,6 +3805,7 @@
 prarie->prairie
 praries->prairies
 pratice->practice
+preambule->preamble
 preample->preamble
 precedessor->predecessor
 preceed->precede
@@ -3915,6 +3937,7 @@
 progessed->progressed
 progidy->prodigy
 programable->programmable
+programm->program
 programms->programs
 progrom->pogrom, program,
 progroms->pogroms, programs,
@@ -4556,6 +4579,7 @@
 slippy->slippery
 slowy->slowly
 smae->same
+smalles->smallest
 smealting->smelting
 smoe->some
 sneeks->sneaks
@@ -4626,6 +4650,7 @@
 speices->species
 spendour->splendour
 spermatozoan->spermatozoon
+spezialisation->specialization
 spezified->specified
 spoace->space
 sponser->sponsor
@@ -4937,6 +4962,7 @@
 ther->there, their, the, other,
 therafter->thereafter
 therby->thereby
+therefor->therefore, therefor,
 therfore->therefore
 theri->their
 theshold->threshold
@@ -5212,6 +5238,7 @@
 usefull->useful
 usefuly->usefully
 useing->using
+usuage->usage
 usualy->usually
 ususally->usually
 vaccum->vacuum