Synonyms and related words :
audacious, bold, calm, coolheaded, courageous, dauntless, fearless, inexcitable, intrepid, nerveless, relaxed, rock-steady, steady, steady-handed, steady-nerved, steel-nerved, strong-nerved, unabashed, unappalled, unawed, unblinking, uncowed, uncringing, undaunted, undismayed, unfaltering, unflinching, unintimidated, unnervous, unquivering, unshaken, unshaky, unshrinking, unstrained, untremulous, unwavering, valiant, valorous, without a tremor