cholesterol vs cholesterin

cholesterol and cholesterin both are nouns.

Word	Noun	Adjective	Verb	Adverb
cholesterol	Yes	No	No	No
cholesterin	Yes	No	No	No

As nouns, cholesterol and cholesterin are synonyms defined as:

cholesterol and cholesterin: an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues

cholesterol (noun)	cholesterin (noun)
an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues	an animal sterol that is normally synthesized by the liver; the most abundant steroid in animal tissues