1. (adj) bastard, by-blow, love child, illegitimate child, illegitimate, whoreson
the illegitimate offspring of unmarried parents
Synonyms: bastard, love child, mongrel, dickhead, son of a bitch, by-blow, prick, illegitimate, cocksucker, shit, whoreson, asshole, illegitimate child
Antonyms: true(a), lawful, morganatic, legal, left-handed, rightful(a), legitimate, lawfully-begotten
2. (adj) illegitimate, illicit, outlaw(a), outlawed, unlawful
contrary to or forbidden by law
Antonyms: lawfully-begotten, morganatic, legitimate, true(a), legal, rightful(a), left-handed, lawful
3. (adj) illegitimate
of marriages and offspring; not recognized as lawful
Synonyms: outlaw(a), unlawful, illicit, outlawed
Antonyms: lawful, lawfully-begotten, morganatic, true(a), legitimate, left-handed, rightful(a), legal
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Synonyms for illegitimate 
