vexation vs bugaboo

vexation and bugaboo both are nouns.

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

As nouns, bugaboo is a hyponym of vexation; that is, bugaboo is a word with a more specific, narrower meaning than vexation:

Other hyponyms of vexation include burden, encumbrance, incumbrance, load, onus, business.

vexation (noun)	bugaboo (noun)
the act of troubling or annoying someone	a source of concern
something or someone that causes anxiety; a source of unhappiness	an imaginary monster used to frighten children
anger produced by some annoying irritation
the psychological state of being irritated or annoyed