cool-headed Synonyms

even-tempered as cool as a cucumber imperturbable unworried carefree level-headed laid-back unagitated undisturbed unruffled unmoved unconcerned at ease cool as a cucumber unperturbed unflustered unexcited unemotional unbothered self-controlled unflappable untroubled unfazed unexcitable tranquil together equanimous equable dispassionate detached cool controlled confident composed collected chilled impassive nonchalant peaceful stolid steady serene self-possessed sedate relaxed quiet poised placid phlegmatic calm