permission, decision, emission, mission, discussion, omission, illusion
Words ending with "ition":AbolitionAcquisitionAdditionAmbitionAmmunitionApparitionAuditionCoalitionCompetitionCompositionConditionContritionDefinitionDemolitionDispositionEditionExhibitionExpeditionExtraditionIgnitionImpositionInhibitionInquisitionIntuitionMalnutritionOppositionPartitionPetitionPositionPrepositionProhibitionPropositionRecognitionRenditionRepetitionRequisitionSuperstitionTraditionTransitionTuitionWords ending with "sion":AbrasionAdmissionAggressionAllusionAscensionCessionCollisionCommissionCompassionCompressionCompulsionConcessionConclusionConcussionConfessionConfusionConversionConvulsionCorrosionDecisionDiffusionDimensionDiscussionDiversionDivisionEnvisionExclusionExcursionExplosionExpressionIllusionImplosionIncisionInvasionMansionObsessionSeclusionSessionTensionVision
Words that end in -tion usually come from Latin, while words that end in -sion usually come from Latin or French. There isn't a strict rule, but -tion is more common and originates from Latin verbs ending in -tio, while -sion more often comes from Latin or French words ending in -sio or -sion.
if the word ends in "cion" or "sion" it is feminine
Some examples of nouns ending with 'tion' and 'sion' are:appreciationapprehensionbeautificationcaptionconclusiondecisiondeclarationemissionemotionfederationfusiongenerationhydrationillusioninitiationjunctionlegislationlesionmansionmissionmotionnationobsessionovationpassionplantationquestionrationrepressionseclusionsensationtensiontuitionutilizationvacationvisionwesternization
I think the answer you want is "nouns" . tion and sion are suffixes that change a verb into a noun. eg. associate -> association . The trick is to know which ending to use.
tension
Action, Fraction - The -tion sound is like "shun". Decision, Fusion = The -sion sound is like "shin".
tension and lesion.
sionist, sionism
I only know one word that starts with de- and endsin -sion is decision.
Some examples of words with the suffix -sion are discussion, decision, and expression.
Words ending with 'sion' are:abrasion, abradeaversion, averconfession, confessconclusion, concludeconfusion, confusedecision, decidedelusion, deludediversion, divertdivision, divideevasion, evadeexplosion, explodefusion, fuseincision, inciseinclusion, includeimpression, impressinvasion, invadeinfusion, infusetelevision, televisetension, tensetorsion, torque