worst vs mop up

worst and mop up both are nouns.

Word	Noun	Adjective	Verb	Adverb
worst	Yes	Yes	Yes	Yes
mop up	Yes	No	Yes	No

As verbs, worst and mop up are synonyms defined as:

Other synonyms of worst include pip, rack up, whip.

worst (noun)	mop up (noun)
the weakest effort or poorest achievement one is capable of	a concluding action
the greatest damage or wickedness of which one is capable
the least favorable outcome

worst (adjective)	mop up (adjective)
(superlative of `bad') most wanting in quality or value or condition

worst (verb)	mop up (verb)
defeat thoroughly	finish a task completely
	defeat thoroughly
	to wash or wipe with or as if with a mop

worst (adverb)	mop up (adverb)
to the highest degree of inferiority or badness