good vs best

good and best both are nouns.

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

good (noun)	best (noun)
a raw material that is sold in large quantities, usually to other businesses for manufacturing or production purposes	the supreme effort one can make
benefit	the person who is most outstanding or excellent; someone who tops all others
moral excellence or admirableness
that which is pleasing or valuable or useful

good (adjective)	best (adjective)
having desirable or positive qualities especially those suitable for a thing specified	(superlative of `good') having the most positive qualities
morally admirable	(comparative and superlative of `well') wiser or more advantageous and hence advisable
promoting or enhancing well-being
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

good (verb)	best (verb)
	get the better of

good (adverb)	best (adverb)
(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')	it would be sensible
completely and absolutely (`good' is sometimes used informally for `thoroughly')	in a most excellent way or manner
	from a position of superiority or authority