deserter vs turncoat

deserter and turncoat both are nouns.

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

As nouns, deserter and turncoat are synonyms defined as:

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

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

deserter (noun)	turncoat (noun)
a person who abandons their duty (as on a military post)	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.