protector vs defender

protector and defender both are nouns.

Word	Noun	Adjective	Verb	Adverb
protector	Yes	No	No	No
defender	Yes	No	No	No

As nouns, protector and defender are synonyms defined as:

Other synonyms of protector include guardian, shielder.

protector (noun)	defender (noun)
a person who cares for persons or property	a person who cares for persons or property
	a fighter who holds out against attack