tetraiodothyronine vs thyroxine

tetraiodothyronine and thyroxine both are nouns.

Word	Noun	Adjective	Verb	Adverb
tetraiodothyronine	Yes	No	No	No
thyroxine	Yes	No	No	No

As nouns, tetraiodothyronine and thyroxine are synonyms defined as:

tetraiodothyronine and thyroxine: hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells

Other synonyms of tetraiodothyronine include T, thyroxin.

tetraiodothyronine (noun)	thyroxine (noun)
hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells	hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells