fill vs fit

fill and fit both are nouns.

Word	Noun	Adjective	Verb	Adverb
fill	Yes	No	Yes	No
fit	Yes	Yes	Yes	No

As verbs, fill and fit are synonyms defined as:

fill and fit: fill, satisfy or meet a want or need or condition or restriction

Other synonyms of fill include conform to, fulfil, fulfill, meet, satisfy.

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

fill (noun)	fit (noun)
a quantity sufficient to satisfy	a sudden flurry of activity (often for no obvious reason)
any material that fills a space or container	the manner in which something fits
	a sudden uncontrollable attack
	a display of bad temper

fill (adjective)	fit (adjective)
	physically and mentally sound or healthy
	meeting adequate standards for a purpose
	(usually followed by `to' or `for') on the point of or strongly disposed

fill (verb)	fit (verb)
become full	make correspond or harmonize
make full, also in a metaphorical sense	make fit
plug with a substance	insert or adjust several objects or people
fill to satisfaction	fill, satisfy or meet a want or need or condition or restriction
eat until one is sated	provide with (something) usually for a specific purpose
fill, satisfy or meet a want or need or condition or restriction	be the right size or shape; fit correctly or as desired
assume, as of positions or roles	conform to some shape or size
appoint someone to (a position or a job)	be compatible, similar or consistent; coincide in their characteristics
occupy the whole of	be agreeable or acceptable to