mitochondrion vs cell organelle

mitochondrion and cell organelle both are nouns.

Word	Noun	Adjective	Verb	Adverb
mitochondrion	Yes	No	No	No
cell organelle	Yes	No	No	No

As nouns, cell organelle is a hypernym of mitochondrion; that is, cell organelle is a word with a broader meaning than mitochondrion:

mitochondrion: an organelle containing enzymes responsible for producing energy
cell organelle: a specialized part of a cell; analogous to an organ

Other hypernyms of mitochondrion include cell organ, organelle.

mitochondrion (noun)	cell organelle (noun)
an organelle containing enzymes responsible for producing energy	a specialized part of a cell; analogous to an organ