better vs good

better and good both are nouns.

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

As nouns, good is a hypernym of better; that is, good is a word with a broader meaning than better:

Other hypernyms of better include goodness.

As nouns, good is a hypernym of better; that is, good is a word with a broader meaning than better:

Other hypernyms of better include goodness.

better (noun)	good (noun)
something superior in quality or condition or effect	a raw material that is sold in large quantities, usually to other businesses for manufacturing or production purposes
the superior one of two alternatives	benefit
someone who bets	moral excellence or admirableness
a superior person having claim to precedence	that which is pleasing or valuable or useful

better (adjective)	good (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	having desirable or positive qualities especially those suitable for a thing specified
(comparative of `good') changed for the better in health or fitness	morally admirable
(comparative and superlative of `well') wiser or more advantageous and hence advisable	promoting or enhancing well-being
more than half	having the normally expected amount
	with or in a close or intimate relationship
	thorough
	generally admired
	resulting favorably
	not left to spoil
	not forged
	tending to promote physical well-being; beneficial to health
	in excellent physical condition
	appealing to the mind
	agreeable or pleasing
	exerting force or influence
	most suitable or right for a particular purpose
	capable of pleasing
	deserving of esteem and respect
	of moral excellence
	having or showing knowledge and skill and aptitude
	financially safe

better (adverb)	good (adverb)
comparative of `well'; in a better or more excellent manner or more advantageously or attractively or to a greater degree etc.	(often used as a combining form) in a good or proper or satisfactory manner or to a high standard (`good' is a nonstandard dialectal variant for `well')
from a position of superiority or authority	completely and absolutely (`good' is sometimes used informally for `thoroughly')