iron out vs heat

iron out is not a noun while heat is a noun.

Word	Noun	Adjective	Verb	Adverb
iron out	No	No	Yes	No
heat	Yes	No	Yes	No

iron out (noun)	heat (noun)
	utility to warm a building
	the presence of heat
	the trait of being intensely emotional
	the sensation caused by heat energy
	a preliminary race in which the winner advances to a more important race
	a form of energy that is transferred by a difference in temperature
	applies to nonhuman mammals: a state or period of heightened sexual arousal and activity

iron out (verb)	heat (verb)
settle or put right	gain heat or get hot
press and smooth with a heated iron	make hot or hotter
	arouse or excite feelings and passions
	provide with heat