fill vs change state

fill is a noun but change state is not a noun.

Word	Noun	Adjective	Verb	Adverb
fill	Yes	No	Yes	No
change state	No	No	Yes	No

As verbs, change state is a hypernym of fill; that is, change state is a word with a broader meaning than fill:

Other hypernyms of fill include turn.

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

fill (verb)	change state (verb)
become full	undergo a transformation or a change of position or action
make full, also in a metaphorical sense
plug with a substance
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