related by blood, esp on the mother's side: compare agnate1
related by derivation or borrowing or by descent from the same ancestral language
The German word Vater is cognate with father
denoting a noun that is related in form and meaning to the verb of which it is the object (e.g. to die a death)
of the same or similar nature
cognately adv
cognateness noun
cognation /kogʹnaysh(ə)n/ noun
[Latin cognatus, from co- + gnatus, natus, past part. of nasci to be born]