nucleole vs nucleolus

nucleole and nucleolus both are nouns.

Word	Noun	Adjective	Verb	Adverb
nucleole	Yes	No	No	No
nucleolus	Yes	No	No	No

As nouns, nucleole and nucleolus are synonyms defined as:

nucleole and nucleolus: a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis

nucleole (noun)	nucleolus (noun)
a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis	a small round body of protein in a cell nucleus; such organelles contain RNA and are involved in protein synthesis