cook up vs dream up

cook up and dream up both are verbs.

Word	Noun	Adjective	Verb	Adverb
cook up	No	No	Yes	No
dream up	No	No	Yes	No

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

Other hypernyms of cook up include concoct, hatch, think of, think up.

cook up (verb)	dream up (verb)
concoct something artificial or untrue	devise or invent
prepare or cook by mixing ingredients