There are 16 words that start with 'blues'.
| blues | bluest | 
| bluesy | bluesier | 
| bluesman | bluesmen | 
| bluestem | blueshift | 
| bluesiest | bluestems | 
| bluestone | blueshifts | 
| bluestones | blueshifted | 
| bluestocking | bluestockings | 
Note: These 16 words that start with 'blues' are found from the USA & Canada version of the tournament Scrabble word list.