spouse equivalent vs spousal equivalent

spouse equivalent and spousal equivalent both are nouns.

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

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

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

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

spouse equivalent (noun)	spousal 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