There are 13 words that end with 'atts'.
batts | matts |
watts | scatts |
abwatts | megawatts |
nanowatts | gigawatts |
kilowatts | terawatts |
microwatts | milliwatts |
multimegawatts | |
Note: These 13 words that end with 'atts' are found from the USA & Canada version of the tournament Scrabble word list.