cool down vs modify

cool down and modify both are verbs.

Word	Noun	Adjective	Verb	Adverb
cool down	No	No	Yes	No
modify	No	No	Yes	No

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

Other hypernyms of cool down include alter, change.

cool down (verb)	modify (verb)
make cool or cooler	make less severe or harsh or extreme
loose heat	add a modifier to a constituent
lose intensity	cause to change; make different; cause a transformation