The Oxford Thesaurus An A-Z Dictionary of Synonyms INTRO ...

eason, justification, cause, need, occasion, right, excuse;
requirement: You have no call to be abusive, regardless of what
you think about him. 16 on call. ready, on duty, standing by, on
stand-by, awaiting orders: They had to remain on call from
midnight till eight o'clock. 17 within call. within earshot or
hearing or (easy) reach: Please stay within call in case I need
you.
calling n. vocation, occupation, profession, business, trade,
employment, work, line, job, m‚tier, pursuit, career, area,
province, (area of) expertise, Brit speciality or US specialty,
Colloq racket: He found his calling as a veterinary surgeon
very satisfying.
callous adj. hardened, thick-skinned, unfeeling, uncaring, insensible,
insensitive, hard, hard-hearted, tough, hardbitten, cold,
cold-hearted, heartless, indifferent, unsympathetic, apathetic,
Colloq hard-boiled, hard-nosed: It was callous of Gerry to go
off to the snooker club right after the funeral.
callow adj. inexperienced, immature, juvenile, na‹ve, green,
guileless, unsophisticated, innocent, raw, unfledged, untried,
Colloq (still) wet behind the ears: It was a mistake to let a
callow youth take out the boat alone.
calm n. 1 quiet, stillness, tranquillity, serenity, hush, peace,
peacefulness: A storm raged outside, but in the harbour was a
breathless calm. 2 calmness, composure, placidity, placidness,
peace, repose, sang-froid, coolness, self-control, equanimity,
self-possession: The calm exhibited by the passengers during
the hijacking was admirable.
--adj. 3 quiet, still, tranquil, serene, peaceful, balmy,
halcyon, mild, undisturbed, unagitated, placid, pacific;
motionless, smooth, even; windless: The sea is never calm in
the same sense as a mountain lake. 4 composed, cool,
cool-headed, self-controlled, impassive, dispassionate, unmoved,
unruffled, serene, tranquil, sedate, staid, stoical, Colloq
together: She remained calm while the others panicked.
--v. 5 Also, calm down. quiet, quieten, still, soothe, hush,
lull, pacify; mollify, appease, placate, become or make quiet or
pacified or less agitated, Colloq cool off or down: The