hugger mugger vs hugger-mugger

hugger mugger is not a noun while hugger-mugger is a noun.

Word	Noun	Adjective	Verb	Adverb
hugger mugger	No	No	Yes	No
hugger-mugger	Yes	Yes	No	Yes

hugger mugger (noun)	hugger-mugger (noun)
	a state of confusion

hugger mugger (adjective)	hugger-mugger (adjective)
	conducted with or marked by hidden aims or methods
	in utter disorder

hugger mugger (verb)	hugger-mugger (verb)
act stealthily or secretively

hugger mugger (adverb)	hugger-mugger (adverb)
	in secrecy