cease vs knock off

cease is a noun but knock off is not a noun.

Word	Noun	Adjective	Verb	Adverb
cease	Yes	No	Yes	No
knock off	No	No	Yes	No

As verbs, knock off is a hyponym of cease; that is, knock off is a word with a more specific, narrower meaning than cease:

cease (noun)	knock off (noun)
(`cease' is a noun only in the phrase `without cease') end

cease (verb)	knock off (verb)
put an end to a state or an activity	stop pursuing or acting
have an end, in a temporal, spatial, or quantitative sense; either spatial or metaphorical	get rid of (someone who may be a threat) by killing
	write quickly
	take by theft
	cut the price of