supplement vs attach

supplement is a noun but attach is not a noun.

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

As verbs, attach is a hypernym of supplement; that is, attach is a word with a broader meaning than supplement:

supplement (noun)	attach (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)	attach (verb)
add to the very end	become attached
add as a supplement to what seems insufficient	cause to be attached
serve as a supplement to	be attached; be in contact with
	take temporary possession of as a security, by legal authority
	create social or emotional ties