turnkey vs gaoler

turnkey and gaoler both are nouns.

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

As nouns, turnkey and gaoler are synonyms defined as:

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

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