mend vs amend

mend is a noun but amend is not a noun.

Word	Noun	Adjective	Verb	Adverb
mend	Yes	No	Yes	No
amend	No	No	Yes	No

As verbs, amend is a hypernym of mend; that is, amend is a word with a broader meaning than mend:

mend: restore by replacing a part or putting together what is torn or broken
amend: to make better

Other hypernyms of mend include ameliorate, better, improve, meliorate.

mend (noun)	amend (noun)
the act of putting something in working order again
sewing that repairs a worn or torn hole (especially in a garment)

mend (verb)	amend (verb)
restore by replacing a part or putting together what is torn or broken	to make better
heal or recover	set straight or right
	make amendments to