Synonyms for tighten up

Synonyms for (verb) tighten up

Synonyms: stiffen, tighten, tighten up, constrain

Definition: restrict

Usage: Tighten the rules; stiffen the regulations

Similar words: restrain, restrict, confine, bound, limit, trammel, throttle

Definition: place limits on (extent or access)

Usage: restrict the use of this parking lot; limit the time you can spend with your friends