Cognate

Adjective

 * 1)  Either descended from the same attested source lexeme of ancestor language, or held on the grounds of the methods of historical linguistics to be regular reflexes of the unattested, reconstructed form of proto-language.

Noun

 * 1) One of a number of things allied in origin or nature.
 * 2)  One who is related to another on the female side.
 * 3) A word either descended from the same base word of the same ancestor language as the given word, or strongly believed to be a regular reflex of the same reconstructed root of proto-language as the given word.

Thesaurus
affiliated, affinal, affinitive, agnate, akin, allied, ally, alter ego, analogon, analogue, ancestry, associate, avuncular, blood, blood relation, blood relative, brother, clansman, close copy, close match, closely related, collateral, collateral relative, common, companion, complement, congenator, congener, congeneric, congenerous, congenial, connate, connatural, connected, connections, consanguine, consanguinean, consanguineous, conspecific, coordinate, correlate, correlative, correspondent, counterpart, derivation, derivative, distaff side, distant relation, distantly related, doublet, enate, eponym, equivalent, etymon, family, fellow, flesh, flesh and blood, folks, foster, general, generic, genetically related, german, germane, image, incident, kin, kindred, kindred spirit, kinfolk, kinnery, kinsfolk, kinsman, kinsmen, kinswoman, kith and kin, like, likeness, mate, matrilateral, matrilineal, matroclinous, near duplicate, near relation, next of kin, novercal, obverse, of common source, of the blood, parallel, patrilateral, patrilineal, patroclinous, pendant, people, picture, posterity, primitive, reciprocal, related, related by blood, relations, relatives, root, second self, sib, sibling, similitude, simulacrum, sister, soul mate, spear kin, spear side, spindle kin, spindle side, such, suchlike, sword side, tally, the like of, the likes of, tribesman, twin, universal, uterine, uterine kin

Derived terms

 * cognateness