fill vs fulfill

fill is a noun but fulfill is not a noun.

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

As verbs, fill and fulfill are synonyms defined as:

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

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

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

fill (noun)	fulfill (noun)
a quantity sufficient to satisfy
any material that fills a space or container

fill (verb)	fulfill (verb)
become full	fill, satisfy or meet a want or need or condition or restriction
make full, also in a metaphorical sense	put in effect
plug with a substance	meet the requirements or expectations of
fill to satisfaction
eat until one is sated
fill, satisfy or meet a want or need or condition or restriction
assume, as of positions or roles
appoint someone to (a position or a job)
occupy the whole of