Machine noises—honk, beep, vroom, clang, zap, boing
Animal names—cuckoo, whip-poor-will, whooping crane, chickadee
Impact sounds—boom, crash, whack, thump, bang
Sounds of the voice—shush, giggle, growl, whine, murmur, blurt, whisper, hiss
Nature sounds—splash, drip, spray, whoosh, buzz, rustle