plughole

• plug hole, plug-hole

From plug +‎ hole.

• Audio (General Australian):

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plughole (plural plugholes)

1. (chiefly Australia, New Zealand, British) The hole at the bottom of a bath, sink or tub, which can be blocked using a plug; a drain (US)
   • 2004, Andrea Levy, chapter 28, in Small Island‎^[1], London: Review, page 295:

     The plughole started to slurp loudly as the water went down it.

   • 2022, Liam McIlvanney, The Heretic, page 199:

     He jabbed his fingers into his hair and worked the dirt from the follicles, watched it swirl away down the plughole, sandy granules, flakes of dust and ash.