hotcake vs hot cake

hotcake and hot cake both are nouns.

Word	Noun	Adjective	Verb	Adverb
hotcake	Yes	No	No	No
hot cake	Yes	No	No	No

As nouns, hotcake and hot cake are synonyms defined as:

hotcake and hot cake: a flat cake of thin batter fried on both sides on a griddle

Other synonyms of hotcake include battercake, flannel-cake, flannel cake, flapcake, flapjack, griddlecake, pancake.

hotcake (noun)	hot cake (noun)
a flat cake of thin batter fried on both sides on a griddle	a flat cake of thin batter fried on both sides on a griddle