turn down vs lour

turn down and lour both are verbs.

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

As verbs, turn down and lour are synonyms defined as:

Other synonyms of turn down include lower.

turn down (verb)	lour (verb)
make lower or quieter	look angry or sullen, wrinkle one's forehead, as if to signal disapproval
take a downward direction	make lower or quieter
reject with contempt	set lower
not accept as true
refuse entrance or membership