deepen vs heat up

deepen and heat up both are verbs.

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

As verbs, heat up is a hyponym of deepen; that is, heat up is a word with a more specific, narrower meaning than deepen:

Other hyponyms of deepen include hot up, screw up, fan, enhance, heighten, raise, amplify, sharpen, heighten, sharpen.

deepen (verb)	heat up (verb)
become more intense	make hot or hotter
make more intense, stronger, or more marked	gain heat or get hot
become deeper in tone	make more intense
make deeper