baking hot vs baking

baking hot is not a noun while baking is a noun.

Word	Noun	Adjective	Verb	Adverb
baking hot	No	Yes	No	No
baking	Yes	Yes	No	No

As adjectives, baking hot and baking are synonyms defined as:

baking hot (noun)	baking (noun)
	cooking by dry heat in an oven
	making bread or cake or pastry etc.

baking hot (adjective)	baking (adjective)
as hot as if in an oven	as hot as if in an oven