well vs good

well and good both are nouns.

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

As adjectives, well and good are synonyms defined as:

As adverbs, well and good are synonyms defined as:

well and good: (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')

well (noun)	good (noun)
a deep hole or shaft dug or drilled to obtain water or oil or gas or brine	a raw material that is sold in large quantities, usually to other businesses for manufacturing or production purposes
an enclosed compartment in a ship or plane for holding something as e.g. fish or a plane's landing gear or for protecting something as e.g. a ship's pumps	benefit
an open shaft through the floors of a building (as for a stairway)	moral excellence or admirableness
a cavity or vessel used to contain liquid	that which is pleasing or valuable or useful
an abundant source

well (adjective)	good (adjective)
in good health especially after having suffered illness or injury	having desirable or positive qualities especially those suitable for a thing specified
wise or advantageous and hence advisable	morally admirable
resulting favorably	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

well (verb)	good (verb)
come up, as of a liquid

well (adverb)	good (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')	(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')
without unusual distress or resentment; with good humor	completely and absolutely (`good' is sometimes used informally for `thoroughly')
indicating high probability; in all likelihood
thoroughly or completely; fully; often used as a combining form
favorably; with approval
to a suitable or appropriate extent or degree
in financial comfort
in a manner affording benefit or advantage
to a great extent or degree
with skill or in a pleasing manner
with prudence or propriety
with great or especially intimate knowledge
(used for emphasis or as an intensifier) entirely or fully