supplement vs supply

supplement and supply both are nouns.

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

supplement (noun)	supply (noun)
a supplementary component that improves capability	the activity of supplying or providing something
a quantity added (e.g. to make up for a deficiency)	offering goods and services for sale
textual matter that is added onto a publication; usually at the end	an amount of something available for use

supplement (verb)	supply (verb)
add to the very end	state or say further
add as a supplement to what seems insufficient	give what is desired or needed, especially support, food or sustenance
serve as a supplement to	give something useful or necessary to
	circulate or distribute or equip with