spousal equivalent vs spouse equivalent

spousal equivalent and spouse equivalent both are nouns.

Word	Noun	Adjective	Verb	Adverb
spousal equivalent	Yes	No	No	No
spouse equivalent	Yes	No	No	No

As nouns, spousal equivalent and spouse equivalent are synonyms defined as:

spousal equivalent and spouse equivalent: a person (not necessarily a spouse) with whom you cohabit and share a long-term sexual relationship

Other synonyms of spousal equivalent include domestic partner, significant other.

spousal equivalent (noun)	spouse equivalent (noun)
a person (not necessarily a spouse) with whom you cohabit and share a long-term sexual relationship	a person (not necessarily a spouse) with whom you cohabit and share a long-term sexual relationship