Synonyms for Cognate (same or very similar meaning)
WordNet sense 1 (one related by blood or origin; especially on sharing an ancestor with another):
sib, blood relation, blood relative
WordNet sense 2 (a word is cognate with another if both derive from the same word in an ancestral language):
cognate word
WordNet sense 3 (related in nature):
connate
WordNet sense 4 (being connected either logically or causally or by shared characteristics ):
related, related to
WordNet sense 5 (related by blood):
akin, consanguineous, kin, blood-related, consanguine, consanguineal
From the ODE community, based on WordNet
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