jailer vs gaoler

jailer and gaoler both are nouns.

Word	Noun	Adjective	Verb	Adverb
jailer	Yes	No	No	No
gaoler	Yes	No	No	No

As nouns, jailer and gaoler are synonyms defined as:

Other synonyms of jailer include jailor, prison guard, screw, turnkey.

jailer (noun)	gaoler (noun)
someone who guards prisoners	someone who guards prisoners