put on the line vs risk

put on the line is not a noun while risk is a noun.

Word	Noun	Adjective	Verb	Adverb
put on the line	No	No	Yes	No
risk	Yes	No	Yes	No

As verbs, put on the line and risk are synonyms defined as:

Other synonyms of put on the line include lay on the line.

put on the line (noun)	risk (noun)
	a venture undertaken without regard to possible loss or injury
	the probability of being exposed to an infectious agent
	the probability of becoming infected given that exposure to an infectious agent has occurred
	a source of danger; a possibility of incurring loss or misfortune

put on the line (verb)	risk (verb)
expose to a chance of loss or damage	expose to a chance of loss or damage
	take a risk in the hope of a favorable outcome