thyroxin vs thyroid hormone

thyroxin and thyroid hormone both are nouns.

Word	Noun	Adjective	Verb	Adverb
thyroxin	Yes	No	No	No
thyroid hormone	Yes	No	No	No

As nouns, thyroid hormone is a hypernym of thyroxin; that is, thyroid hormone is a word with a broader meaning than thyroxin:

thyroxin: hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells
thyroid hormone: any of several closely related compounds that are produced by the thyroid gland and are active metabolically

thyroxin (noun)	thyroid hormone (noun)
hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells	any of several closely related compounds that are produced by the thyroid gland and are active metabolically