n. 25B6; noun
(historical) he acceded to his master's wishes : LORD, overlord, lord and master, ruler, sovereign, monarch, liege (lord), suzerain.
the dog's master : OWNER, keeper.
a chess master : EXPERT, adept, genius, past master, maestro, virtuoso, professional, doyen, authority; informal ace, pro, wizard, whizz, hotshot; Brit. informal dab hand; N. Amer. informal maven, crackerjack.
the master of the ship : CAPTAIN, commander; informal skipper.
the geography master : TEACHER, schoolteacher, schoolmaster, tutor, instructor, preceptor; formal pedagogue.
their spiritual master : GURU, teacher, leader, guide, mentor; swami, Maharishi; Roshi.
servant, amateur, pupil.
25B6; verb
I managed to master my fears : OVERCOME, conquer, beat, quell, quash, suppress, control, overpower, triumph over, subdue, vanquish, subjugate, prevail over, govern, curb, check, bridle, tame, defeat, get the better of, get a grip on, get over; informal lick.
it took ages to master the technique : LEARN, become proficient in, know inside out, know backwards; pick up, grasp, understand; informal get the hang of.
25B6; adjective
a master craftsman : EXPERT, adept, proficient, skilled, skilful, deft, dexterous, adroit, practised, experienced, masterly, accomplished, complete, demon, brilliant; informal crack, ace, mean, wizard; N. Amer. informal crackerjack.
the master bedroom : PRINCIPAL, main, chief; biggest.