periostitis
Periostitis is the inflammation of the periosteum. It is a painful condition that may involve mild swelling and tenderness in the affected area. It often is associated with medial tibial stress syndrome (sometimes also referred to as “shin splints”), which commonly affects runners.
The word apogee is a noun. It is an astronomy term.
Three
cholecystitis
The word biodiversity is a noun. It is a term in the science biology.
The word hydrofoil is a noun. It is a nautical term.
hi
The word "term" is not typically capitalized unless it is a proper noun or at the beginning of a sentence.
The word uncle is a singular noun. The plural term is uncles.
The word repayment is a singular noun. The plural term would be repayments.
The word antiair (one word) is an adjective. It means antiaircraft which is a military term.
I would describe the word gynecologic as a medical term. Of course, medicine is part of science.