| ̷ ̷rən.|tȯ(ə)r, -ȯ(ə), ˈ ̷ ̷rəntə(r) noun
( -s )
Etymology: guaranty (I) + -or
1. : one that guarantees
our Strategic Air Command is the guarantor of our security — Carl Spaatz
2. : one that makes or gives a guaranty or surety : one that enters in a guaranty