Sit out and Sit tight

Sit out verb - Endure to the end.

Sit tight and sit out are semantically related. in stay topic. In some cases you can use "Sit tight" instead a verb "Sit out".

Sit tight verb - Maintain the same position; wait it out.

Sit out and sit tight are semantically related. Sometimes you can use "Sit out" instead a verb phrase "Sit tight".