heat up vs modify

heat up and modify both are verbs.

Word	Noun	Adjective	Verb	Adverb
heat up	No	No	Yes	No
modify	No	No	Yes	No

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

Other hypernyms of heat up include alter, change.

heat up (verb)	modify (verb)
make hot or hotter	make less severe or harsh or extreme
gain heat or get hot	add a modifier to a constituent
make more intense	cause to change; make different; cause a transformation