Vonnegut rhymes with:
aggregate, farragut, mcelligott, superdelegate, surrogate, agate, aggregate, altergott, argot, baggott, benguet, bigot, breguet, cliggott, ergot, faggot, farragut, frigate, gigot, hergott, hoggatt, ingot, kogut, legate, maggot, mcelligott, piggott, pigott, spigot, superdelegate, surrogate, target, traugott, turgut, zagat
Vonnegut sounds like:
vancott, vanished, vannest, vanquished