cool vs water-cooled

cool is a noun but water-cooled is not a noun.

Word	Noun	Adjective	Verb	Adverb
cool	Yes	Yes	Yes	No
water-cooled	No	Yes	No	No

cool (noun)	water-cooled (noun)
the quality of being at a refreshingly low temperature
great coolness and composure under strain

cool (adjective)	water-cooled (adjective)
neither warm nor very cold; giving relief from heat	kept cool or designed to be kept cool by means of water especially circulating water
psychologically cool and unenthusiastic; unfriendly or unresponsive or showing dislike
inducing the impression of coolness; used especially of greens and blues and violets when referring to color
marked by calm self-control (especially in trying circumstances); unemotional
fashionable and attractive at the time; often skilled or socially adept
being satisfactory or in satisfactory condition
used of a quantity or amount (especially of money) for emphasis