boogeyman vs bugbear

boogeyman and bugbear both are nouns.

Word	Noun	Adjective	Verb	Adverb
boogeyman	Yes	No	No	No
bugbear	Yes	No	No	No

As nouns, boogeyman and bugbear are synonyms defined as:

Other synonyms of boogeyman include bogeyman, booger, bugaboo.

boogeyman (noun)	bugbear (noun)
an imaginary monster used to frighten children	an object of dread or apprehension
	an imaginary monster used to frighten children