Have a lie-down and Nod off

Nod off and have a lie-down are semantically related. In some cases you can use "Nod off" instead a verb phrase "Have a lie-down".

Nod off verb - Change from a waking to a sleeping state.

Have a lie-down and nod off are semantically related. You can use "Have a lie-down" instead a verb "Nod off".