heels over head vs head over heels

heels over head and head over heels both are adverbs.

Word	Noun	Adjective	Verb	Adverb
heels over head	No	No	No	Yes
head over heels	No	No	No	Yes

As adverbs, heels over head and head over heels are synonyms defined as:

Other synonyms of heels over head include in great confusion, topsy-turvily, topsy-turvy.

heels over head (adverb)	head over heels (adverb)
in disorderly haste	in disorderly haste