Adjective
1. unagitated
2. composed, serene
3. tranquil, peaceful, calm
4. placid, quiet, still, tranquil, unruffled, settled, windless, peaceful, unagitated
Noun
1. composure
Verb
1. calmness, equanimity, disposition, temperament, calm down
2. quiet, tranquilize, tranquillize, tranquillise, quieten, lull, still, comfort, soothe, console, solace, steady
3. becalm, stabilize, stabilise, calm down
4. cool off, chill out, simmer down, settle down, cool it, change state, turn, sedate
4. tranquilize, tranquillize, tranquillise, affect