Some examples of nouns ending with 'tion' and 'sion' are:appreciationapprehensionbeautificationcaptionconclusiondecisiondeclarationemissionemotionfederationfusiongenerationhydrationillusioninitiationjunctionlegislationlesionmansionmissionmotionnationobsessionovationpassionplantationquestionrationrepressionseclusionsensationtensiontuitionutilizationvacationvisionwesternization
Repition
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.
ammunition, apparition, juxtaposition
ammunition, apparition, juxtaposition
Some examples of words with the suffix -sion are discussion, decision, and expression.
sionist, sionism
I only know one word that starts with de- and endsin -sion is decision.
Fusion Fission
Some words ending in SOME are:awesomegruesomehandsomelonesomenoisomequarrelsometiresomewinsome
Some words ending in RAG are:bragcragdragfragrag
Some words ending with "nym"AntonymHomonymSynonym