3-letter words that start with K are 2 and 4-letter words that start with K are 4. 5-letter words that start with K are 2 and 6-letter words that start with K are 4. 7-letter words that start with K is 1 and 8-letter words that start with K is 1. 9-letter words that start with K is 1 and 13-letter words that start with K is 1. Total start with K are 16.