deserter vs ratter

deserter and ratter both are nouns.

Word	Noun	Adjective	Verb	Adverb
deserter	Yes	No	No	No
ratter	Yes	No	No	No

As nouns, deserter and ratter are synonyms defined as:

deserter and ratter: a disloyal person who betrays or deserts his cause or religion or political party or friend etc.

Other synonyms of deserter include apostate, recreant, renegade, turncoat.

deserter (noun)	ratter (noun)
a person who abandons their duty (as on a military post)	any of several breeds of terrier developed to catch rats
a disloyal person who betrays or deserts his cause or religion or political party or friend etc.	a disloyal person who betrays or deserts his cause or religion or political party or friend etc.