Wren
Part of speech: noun
Definition: Members of a mainly New World passerine bird family Troglodytidae. Small bird of similar appearance to a true wren.
Example sentence: When the Great Fire of London destroyed most of the medieval city in 1666, Christopher Wren was invited to design a new one. Within days, he had drawn up an elegant grid of broad boulevards leading to majestic squares, but it came to nothing - the existing landowners wanted things as they had been.
Sparrow
Part of speech: noun
Definition: The house sparrow, Passer domesticus; a small bird with a short bill, and brown, white and gray feathers.A member of the family Passeridae, comprised of small Old World song birds.A member of the family Emberizidae, comprised of small New World song birds.Generically, any small, nondescript bird.