WordNet sense 1 (great coolness and composure under strain):

aplomb, poise, assuredness, sang-froid, poise

WordNet sense 2 ((color) giving no sensation of warmth):

cold

WordNet sense 3 (uncomfortably cool):

chill, chilly

WordNet sense 4 (not limited or restricted):

unqualified

WordNet sense 5 (being or in accordance with current social fashions):

fashionable, stylish

WordNet sense 6 (marked by calm self-control (especially in trying circumstances); unemotional):

nerveless, coolheaded

WordNet sense 7 (serenely self-possessed and free from agitation especially in times of stress):

composed

WordNet sense 8 (lose intensity):

cool off, cool down