assured balanced coequal collected commonsense composed confident cool coolheaded coordinate equal equanimous equilateral equilibrious eurythmic even fast fiducial finished firm firm as Gibraltar harmonious imperturbable in equilibrium levelheaded logical philosophical poised practical pragmatic predictable proportioned rational reasonable recollected regular reliable sane secure self-assured self-confident self-controlled self-possessed self-restrained sensible sober sober-minded solid sound stable steadfast steady substantial symmetric together unflappable unflinching uniform unshakable unwavering well-set well-set-up without nerves