"Thyroidism" Natural Recordings by Native Speakers
Thyroidism is not a recognized medical term. I think you meant "thyroid disease" or more specifically, a condition affecting the thyroid gland such as hypothyroidism (underactive thyroid) or hyperthyroidism (overactive thyroid).
However, if you meant thyroidism as a potential made-up or nonsense word, I'd be happy to help with that as well.