repair vs amend

repair is a noun but amend is not a noun.

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

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

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

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

As verbs, repair and amend are synonyms defined as:

Other synonyms of repair include rectify, remediate, remedy.

repair (noun)	amend (noun)
the act of putting something in working order again
a frequently visited place
a formal way of referring to the condition of something

repair (verb)	amend (verb)
give new life or energy to	to make better
restore by replacing a part or putting together what is torn or broken	set straight or right
set straight or right	make amendments to
move, travel, or proceed toward some place
make amends for; pay compensation for