Eyelet and Sinus

Eyelet noun - A small hole (usually round and finished around the edges) in cloth or leather for the passage of a cord or hook or bar.

Sinus and eyelet are semantically related. In some cases you can use "Sinus" instead a noun "Eyelet".

Sinus noun - An abnormal passage leading from a suppurating cavity to the body surface.

Eyelet and sinus are semantically related. Sometimes you can use "Eyelet" instead a noun "Sinus".