Daybed and Trundle bed

Daybed noun - An armless couch; a seat by day and a bed by night.

Trundle bed and daybed are semantically related. In some cases you can use "Trundle bed" instead a noun "Daybed".

Trundle bed noun - A low bed to be slid under a higher bed.

Daybed and trundle bed are semantically related. You can use "Daybed" instead a noun phrase "Trundle bed".