pay up vs liquidate

pay up and liquidate both are verbs.

Word	Noun	Adjective	Verb	Adverb
pay up	No	No	Yes	No
liquidate	No	No	Yes	No

As verbs, liquidate is a hyponym of pay up; that is, liquidate is a word with a more specific, narrower meaning than pay up:

Other hyponyms of pay up include pay off.

pay up (verb)	liquidate (verb)
cancel or discharge a debt	get rid of (someone who may be a threat) by killing
	eliminate by paying off (debts)
	convert into cash
	settle the affairs of by determining the debts and applying the assets to pay them off