There are 11 words that start with 'lumpi'.
| lumpier | lumpily |
| lumping | lumpish |
| lumpiest | lumpiness |
| lumpingly | lumpishly |
| lumpinesses | lumpishness |
| lumpishnesses | |
Note: These 11 words that start with 'lumpi' are found from the USA & Canada version of the tournament Scrabble word list.