Grip is a related term of bolt.
As nouns the difference between grip and bolt
is that
grip is a hold or way of holding, particularly with the hand or
grip can be (dialectal) a small ditch or trench; a channel to carry off water or other liquid; a drain or
grip can be (obsolete) the griffin while
bolt is (
land covered by trees).
As a verb grip
is to take hold of, particularly with the hand.