cilium vs organelle

cilium and organelle both are nouns.

Word	Noun	Adjective	Verb	Adverb
cilium	Yes	No	No	No
organelle	Yes	No	No	No

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

cilium: a hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms
organelle: a specialized part of a cell; analogous to an organ

Other hypernyms of cilium include cell organ, cell organelle.

cilium (noun)	organelle (noun)
a hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms	a specialized part of a cell; analogous to an organ
any of the short curved hairs that grow from the edges of the eyelids