Embrasure and Underbelly

Embrasure noun - An opening (in a wall or ship or armored vehicle) for firing through.

Underbelly and embrasure are semantically related. In some cases you can use "Underbelly" instead a noun "Embrasure".

Underbelly noun - A social sphere that exists outside of the mainstream.

Embrasure and underbelly are semantically related. Sometimes you can use "Embrasure" instead a noun "Underbelly".