Synovitis and Tenosynovitis

Synovitis noun - Inflammation of the synovial membrane that lines a synovial joint; results in pain and swelling.

Tenosynovitis and synovitis are semantically related. In some cases you can replace term "Tenosynovitis" with "Synovitis", this nouns are similar.

Tenosynovitis noun - Inflammation of a tendon and its enveloping sheath.

Synovitis and tenosynovitis are semantically related. Sometimes you can use "Synovitis" instead a noun "Tenosynovitis".