tailspin

Synonyms

breakdown, crack-up, nervous breakdown;

Near Antonyms

aplomb, calmness, composure, coolness, imperturbability, placidity, self-possession, sereneness, serenity, tranquillity (or tranquility), tranquilness;

Related Words

frazzle, freak-out, meltdown;

alarm (also alarum), anxiety, apprehension, disquiet;

excitability, nervousness;

disturbance;

agitation, discomposure, perturbation;

basket case;