defector vs deserter

defector and deserter both are nouns.

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

As nouns, defector and deserter are synonyms defined as:

defector and deserter: a person who abandons their duty (as on a military post)

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