angiotensin vs angiotonin

angiotensin and angiotonin both are nouns.

Word	Noun	Adjective	Verb	Adverb
angiotensin	Yes	No	No	No
angiotonin	Yes	No	No	No

As nouns, angiotensin and angiotonin are synonyms defined as:

angiotensin and angiotonin: any of several vasoconstrictor substances (trade name Hypertensin) that cause narrowing of blood vessels

Other synonyms of angiotensin include Hypertensin.

angiotensin (noun)	angiotonin (noun)
any of several vasoconstrictor substances (trade name Hypertensin) that cause narrowing of blood vessels	any of several vasoconstrictor substances (trade name Hypertensin) that cause narrowing of blood vessels