- thrush (n.1)
- type of songbird, Old English þræsce, variant of þrysce, from Proto-Germanic *thruskjon (source also of Old Norse þröstr, Norwegian trost, Old High German drosca), from PIE *trozdo- (source also of Latin turdus, Lithuainian strazdas "thrush," Middle Irish truid, Welsh drudwy "starling," Old Church Slavonic drozgu, Russian drozdu).
- thrush (n.2)
- throat disease, 1660s, probably from a Scandinavian source (such as Norwegian, Danish trøske, Swedish torsk), but its roots and original meaning are unclear.
