bogeyman vs bugaboo

bogeyman and bugaboo both are nouns.

Word	Noun	Adjective	Verb	Adverb
bogeyman	Yes	No	No	No
bugaboo	Yes	No	No	No

As nouns, bogeyman and bugaboo are synonyms defined as:

Other synonyms of bogeyman include booger, boogeyman, bugbear.

bogeyman (noun)	bugaboo (noun)
an imaginary monster used to frighten children	a source of concern
	an imaginary monster used to frighten children