heated up vs heated

heated up and heated both are adjectives.

Word	Noun	Adjective	Verb	Adverb
heated up	No	Yes	No	No
heated	No	Yes	No	No

As adjectives, heated up and heated are synonyms defined as:

heated up and heated: made warm or hot (`het' is a dialectal variant of `heated')

Other synonyms of heated up include het, het up.

heated up (adjective)	heated (adjective)
made warm or hot (`het' is a dialectal variant of `heated')	made warm or hot (`het' is a dialectal variant of `heated')
	marked by emotional heat; vehement