A collar worn by a horse, immediately behind the head, to which a handle, strap, or rope may be attached.
In some styles of horse halter and bridle, an optional part similar to a throatlatch.
guarantor
surety
sponsor
guarantee
fastener, retainer, toggle, catch
bondsman, surety, guarantor, bailor, backer
safety strap (gloss)
neck collar (gloss)
fastening cord (qualifier), chinstrap
catch, latch
lock tumbler
safety catch, rifle sear
gutter hook (gloss)
boy’s buttock