Be recumbent and Lay down

Lay down and be recumbent are semantically related in lie down topic. In some cases you can use "Lay down" instead a verb phrase "Be recumbent".

Lay down verb - To put into effect through legislative or authoritative action.

Be recumbent and lay down are semantically related in flat topic. Sometimes you can use "Be recumbent" instead a verb "Lay down", if it concerns topics such as lie down.