red-hot vs hot

red-hot and hot both are adjectives.

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

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

Other synonyms of red-hot include blistering.

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

red-hot (adjective)	hot (adjective)
very fast; capable of quick response and great speed	used of physical heat; having a high or higher than desirable temperature or giving off heat or feeling or causing a sensation of heat or burning
glowing red with heat	(extended meanings, especially of psychological heat) marked by intensity or vehemence especially of passion or enthusiasm
newest or most recent	marked by excited activity
having strong sexual appeal	charged or energized with electricity
characterized by intense emotion or interest or excitement	having or showing great eagerness or enthusiasm
	very fast; capable of quick response and great speed
	made recently
	very good; often used in the negative
	recently stolen or smuggled
	having or bringing unusually good luck
	of a seeker; very near to the object sought
	newest or most recent
	very popular or successful
	having or dealing with dangerously high levels of radioactivity
	sexually excited or exciting
	performed or performing with unusually great skill and daring and energy
	producing a burning sensation on the taste nerves
	very unpleasant or even dangerous
	characterized by violent and forceful activity or movement; very intense
	wanted by the police
	(color) bold and intense