Hypertensin vs angiotensin

Hypertensin and angiotensin both are nouns.

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

As nouns, Hypertensin and angiotensin are synonyms defined as:

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

Other synonyms of Hypertensin include angiotonin.

Hypertensin (noun)	angiotensin (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