increment vs supplement

increment and supplement both are nouns.

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

As nouns, supplement is a hyponym of increment; that is, supplement is a word with a more specific, narrower meaning than increment:

increment (noun)	supplement (noun)
the amount by which something increases	a supplementary component that improves capability
a process of becoming larger or longer or more numerous or more important	a quantity added (e.g. to make up for a deficiency)
	textual matter that is added onto a publication; usually at the end

increment (verb)	supplement (verb)
	add to the very end
	add as a supplement to what seems insufficient
	serve as a supplement to