different between closedown vs turndown

English

From the verb phrase close down.

closedown (countable and uncountable, plural closedowns)

(radio, television) The point when a radio or television station shuts down transmission and goes off the air for a predetermined period, as used to happen overnight.

turn +? down

turndown (plural turndowns)

A downturn.
A rejection.
(hotels) The service of turning down the bedcovers and often leaving chocolates, etc., on the pillow.
A downward pointing extension to a vehicle muffler.

turndown (not comparable)

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