Synonyms of bastard in English:

bastard


See US English definition of bastard

See UK English definition of bastard

See Spanish definition of bastardo

noun

1‘he had fathered a bastard’

SYNONYMS
illegitimate child, child born out of wedlock
dated love child, by-blow
archaic natural child, natural daughter, natural son

2‘the director's an arrogant bastard’

SYNONYMS
scoundrel, villain, rogue, rascal, brute, animal, weasel, snake, monster, ogre, wretch, devil, good-for-nothing, reprobate, wrongdoer, evil-doer
picaro
informal scumbag, pig, swine, louse, hound, cur, rat, beast, son of a bitch, SOB, low life, skunk, nasty piece of work, ratbag, wrong 'un
British informal git, toerag, scrote, blighter, bad lot
Irish informal spalpeen, sleeveen
North American informal fink, rat fink
North American informal butthole
West Indian informal scamp
Australian, New Zealand informal dingo
informal, dated cad, heel, bad egg, dastard, knave, stinker
British informal, dated rotter, bounder
archaic blackguard, miscreant, varlet, vagabond, rapscallion, whoreson
vulgar slang shit, fucker
British vulgar slang wanker, tosser, arsehole, sod, bugger
North American vulgar slang fuck, motherfucker, asshole, mofo, mother

adjective

1‘a bastard child’

SYNONYMS
illegitimate, born out of wedlock
archaic natural

2‘a bastard language’

SYNONYMS
hybrid, alloyed
adulterated, impure, inferior