glycerin vs glycerol

glycerin and glycerol both are nouns.

Word	Noun	Adjective	Verb	Adverb
glycerin	Yes	No	No	No
glycerol	Yes	No	No	No

As nouns, glycerin and glycerol are synonyms defined as:

glycerin and glycerol: a sweet syrupy trihydroxy alcohol obtained by saponification of fats and oils

Other synonyms of glycerin include glycerine.

glycerin (noun)	glycerol (noun)
a sweet syrupy trihydroxy alcohol obtained by saponification of fats and oils	a sweet syrupy trihydroxy alcohol obtained by saponification of fats and oils