tyrocidine vs tyrocidin

tyrocidine and tyrocidin both are nouns.

Word	Noun	Adjective	Verb	Adverb
tyrocidine	Yes	No	No	No
tyrocidin	Yes	No	No	No

As nouns, tyrocidine and tyrocidin are synonyms defined as:

tyrocidine and tyrocidin: a basic polypeptide antibiotic derived from a soil bacterium; a major component of tyrothricin

tyrocidine (noun)	tyrocidin (noun)
a basic polypeptide antibiotic derived from a soil bacterium; a major component of tyrothricin	a basic polypeptide antibiotic derived from a soil bacterium; a major component of tyrothricin