Your 'muscles' make your body move.
body
bare
Atoll
"Ocean"...?
mer, I think it means "sea"
Aching is a 6 letter word that describes sore muscles.
Paul's letter says the body is a Temple of the Holy Spirit. He also said our bodies are subject to decay, which means we will all ultimately die.
writhe
"PS" stands for "postscript," which is an additional remark or message added after the main body of a letter. It is typically used to include information that was forgotten or added as an afterthought.
body, bunch, bundle
The body of a letter contains the message, the reason for writing the letter. The body is the "meat" of the letter.