cool vs unfriendly

cool is a noun but unfriendly is not a noun.

Word	Noun	Adjective	Verb	Adverb
cool	Yes	Yes	Yes	No
unfriendly	No	Yes	No	No

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

cool (adjective)	unfriendly (adjective)
neither warm nor very cold; giving relief from heat	not disposed to friendship or friendliness
psychologically cool and unenthusiastic; unfriendly or unresponsive or showing dislike	not easy to understand or use
inducing the impression of coolness; used especially of greens and blues and violets when referring to color	very unfavorable to life or growth
marked by calm self-control (especially in trying circumstances); unemotional	not friendly
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