know vs dirty word

know and dirty word both are nouns.

Word	Noun	Adjective	Verb	Adverb
know	Yes	No	Yes	No
dirty word	Yes	No	No	No

know (noun)	dirty word (noun)
the fact of being aware of information that is known to few people	an offensive or indecent word or phrase
	a word that is considered to be unmentionable

know (verb)	dirty word (verb)
be familiar or acquainted with a person or an object
be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about
know how to do or perform something
have firsthand knowledge of states, situations, emotions, or sensations
accept (someone) to be what is claimed or accept his power and authority
know the nature or character of
be able to distinguish, recognize as being different
perceive as familiar
have fixed in the mind
have sexual intercourse with