aplomb assurance balance common sense confidence cool head coolheadedness coolness due sense of equability equanimity equilibrium good sense horse sense levelheadedness plain sense poise possession practical mind practical wisdom practicality presence of mind rationality reason reasonableness restraint saneness sanity self-assurance self-command self-confidence self-control self-possession self-restraint sense sensibleness sober-mindedness soberness sobriety soundness well-regulated mind