The sport of greyhound racing

A sniffer dog trained to find drugs.

A chew toy for a dog

A police officer who is in charge of a police dog

Any of a number of plants with unscented flowers in the genus Viola, now especially Viola riviniana.

A person trained to handle a dog, especially a police dog or a K-9 unit in the military

Synonym of teacup puppy

(archaic) A short-legged, long-bodied dog, now extinct, bred to run on a wheel to turn a spit.

A hook or clamp used to fasten a pipe to a riverbed.

(derogatory) a person low in social rank / Used other than figuratively or idiomatically: see gutter, dog.