Crack down and Double over

Crack down verb - Repress or suppress (something regarded as undesirable).

Double over and crack down are semantically related. In some cases you can use "Double over" instead a verb "Crack down".

Double over verb - Bend over or curl up, usually with laughter or pain.

Crack down and double over are semantically related. Sometimes you can use "Crack down" instead a verb "Double over".