There are 14 words that start with 'swamp'.
| swamp | swamps | swampy | 
| swamped | swamper | swampers | 
| swampier | swamping | swampish | 
| swampiest | swampland | swampiness | 
| swamplands | swampinesses | |
Note: These 14 words that start with 'swamp' are found from the USA & Canada version of the tournament Scrabble word list.