red-hot vs lush

red-hot is not a noun while lush is a noun.

Word	Noun	Adjective	Verb	Adverb
red-hot	No	Yes	No	No
lush	Yes	Yes	No	No

As adjectives, red-hot and lush are synonyms defined as:

Other synonyms of red-hot include juicy, luscious, toothsome, voluptuous.

red-hot (noun)	lush (noun)
	a person who drinks alcohol to excess habitually

red-hot (adjective)	lush (adjective)
very fast; capable of quick response and great speed	produced or growing in extreme abundance
glowing red with heat	tender and full of juice
newest or most recent	ostentatiously rich and superior in quality
having strong sexual appeal	having strong sexual appeal
characterized by intense emotion or interest or excitement