supplement vs furnish

supplement is a noun but furnish is not a noun.

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

supplement (noun)	furnish (noun)
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

supplement (verb)	furnish (verb)
add to the very end	give something useful or necessary to
add as a supplement to what seems insufficient	provide or equip with furniture
serve as a supplement to