fill the bill vs conform to

fill the bill and conform to both are verbs.

Word	Noun	Adjective	Verb	Adverb
fill the bill	No	No	Yes	No
conform to	No	No	Yes	No

As verbs, conform to is a hypernym of fill the bill; that is, conform to is a word with a broader meaning than fill the bill:

fill the bill: be what is needed or be good enough for what is required
conform to: fill, satisfy or meet a want or need or condition or restriction

Other hypernyms of fill the bill include fill, fit, fulfil, fulfill, meet, satisfy.

fill the bill (verb)	conform to (verb)
be what is needed or be good enough for what is required	behave in accordance or in agreement with
	fill, satisfy or meet a want or need or condition or restriction
	observe