The bulk update request #8547 is pending approval.
create alias chin_strap (8) -> chinstrap (4)
Reason: Alias the two-word form to the single word.
I am pretty sure they both mean the same thing - a narrow band fastened to a hat or helmet that goes under the wearer's chin to keep it from falling off their head.
The two-word form is currently more popular on e621, but the single-word form is the primary entry in the OED and Wiktionary .
