Close up and Hush-hush

Close up verb - Unite or bring into contact or bring together the edges of.

Hush-hush and close up are semantically related. in silence topic. In some cases you can use "Hush-hush" instead a verb "Close up", when it comes to topics like make or be quiet.

Hush-hush adjective - Not known or meant to be known by the general populace.

Close up and hush-hush are semantically related. Sometimes you can use "Close up" instead a verb phrase "Hush-hush".