keyfob vs key fob

keyfob and key fob both are nouns.

Word	Noun	Adjective	Verb	Adverb
keyfob	Yes	No	No	No
key fob	Yes	No	No	No

As nouns, keyfob and key fob are synonyms defined as:

keyfob and key fob: A small object fastened to a key chain or key ring and designed to be comfortably grasped.

keyfob (noun)	key fob (noun)
A small object fastened to a key chain or key ring and designed to be comfortably grasped.	A small object fastened to a key chain or key ring and designed to be comfortably grasped.