• at dead of night

• at dead of night

• at dead of night

• in the night

• under favour of the night, under the cope of night

• nocturnal

• midnight

• at night, at night-time, by night, night, night-time, o'nights

• night, nightly, nocturnal

• to be on nightshift, to work nights

• to cheer

• at night, at night-time, night, night-time

• watch

• all-night, night, nightly, overnight

• nightshift, to be on nightshift, to work nights

• by night, o'nights

• sergeant of the watch

• nocturnal arc

• to sit up

• nightly

• serenade