risk vs put on the line

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

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

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

Other synonyms of risk include lay on the line.

risk (noun)	put on the line (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

risk (verb)	put on the line (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