Upstart

Part of speech: noun (n.)

1. One who has risen suddenly, as from low life to wealth, power, or honor; a parvenu. Bacon.

2. The meadow saffron. Dr. Prior.

Part of speech: verb (v.)

To start or spring up suddenly. Spenser. Tennyson.

Part of speech: adjective (a.)

Suddenly raised to prominence or consequence. "A race of upstart creatures." Milton.