parathyroid vs parathyroid gland

parathyroid and parathyroid gland both are nouns.

Word	Noun	Adjective	Verb	Adverb
parathyroid	Yes	No	No	No
parathyroid gland	Yes	No	No	No

As nouns, parathyroid and parathyroid gland are synonyms defined as:

parathyroid and parathyroid gland: any one of four endocrine glands situated above or within the thyroid gland

parathyroid (noun)	parathyroid gland (noun)
any one of four endocrine glands situated above or within the thyroid gland	any one of four endocrine glands situated above or within the thyroid gland