be on cloud nine vs walk on air

be on cloud nine and walk on air both are verbs.

Word	Noun	Adjective	Verb	Adverb
be on cloud nine	No	No	Yes	No
walk on air	No	No	Yes	No

As verbs, be on cloud nine and walk on air are synonyms defined as:

Other synonyms of be on cloud nine include exult, jump for joy.

be on cloud nine (verb)	walk on air (verb)
feel extreme happiness or elation	feel extreme happiness or elation