fill up vs change state

fill up and change state both are verbs.

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

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

Other hypernyms of fill up include turn.

fill up (verb)	change state (verb)
make full, also in a metaphorical sense	undergo a transformation or a change of position or action
become full
eat until one is sated
fill or stop up