better vs mend

better and mend both are nouns.

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

As verbs, mend is a hyponym of better; that is, mend is a word with a more specific, narrower meaning than better:

As verbs, mend is a hyponym of better; that is, mend is a word with a more specific, narrower meaning than better:

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

better (noun)	mend (noun)
something superior in quality or condition or effect	the act of putting something in working order again
the superior one of two alternatives	sewing that repairs a worn or torn hole (especially in a garment)
someone who bets
a superior person having claim to precedence

better (adjective)	mend (adjective)
(comparative of `good') superior to another (of the same class or set or kind) in excellence or quality or desirability or suitability; more highly skilled than another
(comparative of `good') changed for the better in health or fitness
(comparative and superlative of `well') wiser or more advantageous and hence advisable
more than half

better (verb)	mend (verb)
get better	restore by replacing a part or putting together what is torn or broken
to make better	heal or recover
surpass in excellence

better (adverb)	mend (adverb)
comparative of `well'; in a better or more excellent manner or more advantageously or attractively or to a greater degree etc.
from a position of superiority or authority