infuse vs fill up

infuse and fill up both are verbs.

Word	Noun	Adjective	Verb	Adverb
infuse	No	No	Yes	No
fill up	No	No	Yes	No

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

Other hypernyms of infuse include fill, make full.

infuse (verb)	fill up (verb)
introduce into the body through a vein, for therapeutic purposes	make full, also in a metaphorical sense
let sit in a liquid to extract a flavor or to cleanse	become full
fill, as with a certain quality	eat until one is sated
undergo the process of infusion	fill or stop up
teach and impress by frequent repetitions or admonitions