Button up and Secure the hatches

Button up verb - Refuse to talk or stop talking; fall silent.

Secure the hatches and button up are semantically related in prepare for trouble topic. In some cases you can use "Secure the hatches" instead a verb "Button up".

Button up and secure the hatches are semantically related in prepare for trouble topic. You can use "Button up" instead a verb phrase "Secure the hatches".