hotplate vs hot plate

hotplate and hot plate both are nouns.

Word	Noun	Adjective	Verb	Adverb
hotplate	Yes	No	No	No
hot plate	Yes	No	No	No

As nouns, hotplate and hot plate are synonyms defined as:

hotplate and hot plate: a portable electric appliance for heating or cooking or keeping food warm

hotplate (noun)	hot plate (noun)
a portable electric appliance for heating or cooking or keeping food warm	a portable electric appliance for heating or cooking or keeping food warm