keep back vs freeze

keep back is not a noun while freeze is a noun.

Word	Noun	Adjective	Verb	Adverb
keep back	No	No	Yes	No
freeze	Yes	No	Yes	No

As verbs, freeze is a hyponym of keep back; that is, freeze is a word with a more specific, narrower meaning than keep back:

Other hyponyms of keep back include block, immobilise, immobilize, keep to oneself, deny, reserve, immobilise, immobilize, deprive.

keep back (noun)	freeze (noun)
	an interruption or temporary suspension of progress or movement
	fixing (of prices or wages etc) at a particular level
	weather cold enough to cause freezing
	the withdrawal of heat to change something from a liquid to a solid

keep back (verb)	freeze (verb)
prevent the action or expression of	be cold
hold back; refuse to hand over or share	anesthetize by cold
secure and keep for possible future use or application	suddenly behave coldly and formally
	change to ice
	stop a process or a habit by imposing a freeze on it
	cause to freeze
	prohibit the conversion or use of (assets)
	change from a liquid to a solid when cold
	stop moving or become immobilized
	be very cold, below the freezing point