| lump | lumps | lumpy | plump | lumpiness |
| pump | pumped | pumping | pumper | pumpkin |
| truck | trucks | trucking | struck | trucker |
| love | lovely | clover | lovingly | loveliness |
| crumb | crumbs | crumble | crumbly | crumbling |
| funny | unfunny | funnier | funnily | funniest |
| stumble | stumbles | stumbled | stumbling | stumbling |
| stump | stumps | stumpy | stumped | stumping |
| month | months | monthly | bimonthly | bimonthly |
