Lesion and Ulceration

Lesion noun - Any localized abnormal structural change in a bodily part.

Ulceration and lesion are semantically related in ulcer topic. In some cases you can use "Ulceration" instead a noun "Lesion".

Ulceration noun - A circumscribed inflammatory and often suppurating lesion on the skin or an internal mucous surface resulting in necrosis of tissue.

Lesion and ulceration are semantically related in inflammatory condition topic. You can use "Lesion" instead a noun "Ulceration".