There are 21 words that start with 'nett'.
nett | netts | netty |
netted | netter | nettle |
nettly | netters | nettier |
netting | nettled | nettler |
nettles | nettable | nettiest |
nettings | nettlers | nettlier |
nettling | nettliest | nettlesome |
Note: These 21 words that start with 'nett' are found from the USA & Canada version of the tournament Scrabble word list.