Spousal equivalent and Someone

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

Someone and spousal equivalent are semantically related. In some cases you can use "Someone" instead a noun phrase "Spousal equivalent".

Someone noun - A human being.

Spousal equivalent and someone are semantically related. Sometimes you can replace phrase "Spousal equivalent" with "Someone", this terms are similar.