Dogwatch and Graveyard shift

Dogwatch noun - Either of two short watches: from 4-6 pm or 6-8 pm.

Graveyard shift and dogwatch are semantically related in nighttime work schedule topic. In some cases you can use "Graveyard shift" instead a noun "Dogwatch", when it comes to topics like evening work shift.

Graveyard shift noun - The work shift during the night (as midnight to 8 a.m.).

Dogwatch and graveyard shift are semantically related in night shift topic. You can use "Dogwatch" instead a noun phrase "Graveyard shift".