turn down vs repel

turn down and repel both are verbs.

Word	Noun	Adjective	Verb	Adverb
turn down	No	No	Yes	No
repel	No	No	Yes	No

As verbs, repel is a hyponym of turn down; that is, repel is a word with a more specific, narrower meaning than turn down:

Other hyponyms of turn down include rebuff, snub.

turn down (verb)	repel (verb)
make lower or quieter	reject outright and bluntly
take a downward direction	force or drive back
reject with contempt	cause to move back by force or influence
not accept as true	be repellent to; cause aversion in
refuse entrance or membership	fill with distaste