There are 15 words that end with 'wness'.
lowness | fewness | newness |
nowness | rawness | skewness |
slowness | askewness | callowness |
hollowness | mellowness | narrowness |
fallowness | sallowness | shallowness |
Note: These 15 words that end with 'wness' are found from the USA & Canada version of the tournament Scrabble word list.