ratter

Nouns

(n) a disloyal person who betrays or deserts his cause or religion or political party or friend etc. apostate, deserter, turncoat, recreant, renegade,
(n) any of several breeds of terrier developed to catch rats rat terrier,

Synonyms

apostate deserter turncoat recreant renegade rat terrier

Words of close approximity

ratty

rattan rattle Rattus