thyromegaly vs goitre

thyromegaly and goitre both are nouns.

Word	Noun	Adjective	Verb	Adverb
thyromegaly	Yes	No	No	No
goitre	Yes	No	No	No

As nouns, thyromegaly and goitre are synonyms defined as:

thyromegaly and goitre: abnormally enlarged thyroid gland; can result from underproduction or overproduction of hormone or from a deficiency of iodine in the diet

Other synonyms of thyromegaly include goiter, struma.

thyromegaly (noun)	goitre (noun)
abnormally enlarged thyroid gland; can result from underproduction or overproduction of hormone or from a deficiency of iodine in the diet	abnormally enlarged thyroid gland; can result from underproduction or overproduction of hormone or from a deficiency of iodine in the diet