walk on air vs be on cloud nine

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

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

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

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

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