self-possessed Synonyms

collected self-collected equanimous self-contained poised tranquil unmoved unruffled as cool as a cucumber undisturbed together steady sober serene self-reliant self-confident self-assured unagitated laid-back unperturbed unflustered unemotional self-controlled unflappable untroubled unfazed unexcitable even-tempered imperturbable coolheaded levelheaded level-headed sedate reserved equable easy easeful dispassionate cool-headed cool controlled confident composed chilled centered calm assured equilibrious impassive relaxed