Bolt is a related term of buckle.
As nouns the difference between bolt and buckle
is that bolt is (land covered by trees) while buckle is (countable) a clasp used for fastening two things together, such as the ends of a belt, or for retaining the end of a strap.
As a verb buckle is
to distort or collapse under physical pressure; especially, of a slender structure in compression or buckle can be to fasten using a buckle.