turn down vs pass up

turn down and pass up both are verbs.

Word	Noun	Adjective	Verb	Adverb
turn down	No	No	Yes	No
pass up	No	No	Yes	No

As verbs, turn down and pass up are synonyms defined as:

Other synonyms of turn down include decline, refuse, reject.

turn down (verb)	pass up (verb)
make lower or quieter	fail to acknowledge
take a downward direction	not accept as true
reject with contempt
not accept as true
refuse entrance or membership