The phrase "become jammed" can be used to describe a situation where something gets stuck or blocked, causing an obstruction. Luckily, there are several synonyms that can be used to accurately convey this meaning. One synonym for "become jammed" is "get clogged," which is often used to describe a drain or gutter that has become blocked. Another option is "become obstructed," which is a common phrase used in medical contexts to describe a blocked artery or airway. "Get stuck" is another useful synonym, which can be used to describe anything from a zipper that won't budge to a car that is stranded in mud.