pass up vs turn down

pass up and turn down both are verbs.

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

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

Other synonyms of pass up include decline, refuse, reject.

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