Spouse equivalent and Someone

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

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

Someone noun - A human being.

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