KEY: Ruthless.
SYN: Unpitying, unrelenting, truculent, unsparing.
ANT: Tender, regretful, lenient, compassionate, forbearing,long-suffering.

• Burst \v
• Bury
• Business
• Bustle
• Busy
• But
• Butchery, {[See ~]?}
• Buxom
• Buy
• Buyer, [See BUY]
• Cabal
• Cabalistic
• Cabbage
• Cachinnation
• Cackle, [See CACHINNATION]
• Cadaverous
• Caducity
• Cage
• Caitiff
• Cajole
• Calamitous
• Calamity
• Calculate
• Calculated
• Calculating