thyromegaly vs goiter

thyromegaly and goiter both are nouns.

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

As nouns, thyromegaly and goiter are synonyms defined as:

thyromegaly and goiter: 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 goitre, struma.

thyromegaly (noun)	goiter (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