caterpillar /katˈər-pi-lər/

1. A butterfly or moth grub
2. Extended to other insect larvae
3. An unproductive consumer (archaic)
4. (Caterpillar®) a tractor or other (esp earthmoving) vehicle running on endless articulated tracks made up of a series of flat metal plates

• threshels
• thresher
• threshers
• thresher-shark
• thresher whale
• thresher whales
• threshes
• threshing
• threshing floor
• threshing floors
• threshing machine
• threshing machines
• threshing mill
• threshings
• threshold
• threshold dose
• threshold doses
• threshold lighting
• threshold lights
• threshold of audibility
• threshold of sound
• thresholds
• thretty
• threw
• thrice