wallow vs be on cloud nine

wallow is a noun but be on cloud nine is not a noun.

Word	Noun	Adjective	Verb	Adverb
wallow	Yes	No	Yes	No
be on cloud nine	No	No	Yes	No

As verbs, be on cloud nine is a hypernym of wallow; that is, be on cloud nine is a word with a broader meaning than wallow:

Other hypernyms of wallow include exult, jump for joy, walk on air.

wallow (noun)	be on cloud nine (noun)
an indolent or clumsy rolling about
a puddle where animals go to wallow

wallow (verb)	be on cloud nine (verb)
delight greatly in	feel extreme happiness or elation
devote oneself entirely to something; indulge in to an immoderate degree, usually with pleasure
be ecstatic with joy
roll around
rise up as if in waves