affix vs supplement

affix and supplement both are nouns.

Word	Noun	Adjective	Verb	Adverb
affix	Yes	No	Yes	No
supplement	Yes	No	Yes	No

As verbs, affix and supplement are synonyms defined as:

Other synonyms of affix include add on, append.

affix (noun)	supplement (noun)
a linguistic element added to a word to produce an inflected or derived form	a supplementary component that improves capability
	a quantity added (e.g. to make up for a deficiency)
	textual matter that is added onto a publication; usually at the end

affix (verb)	supplement (verb)
stick or fasten to	add to the very end
add to the very end	add as a supplement to what seems insufficient
attach or become attached to a stem word	serve as a supplement to