cilium vs cell organ

cilium and cell organ both are nouns.

Word	Noun	Adjective	Verb	Adverb
cilium	Yes	No	No	No
cell organ	Yes	No	No	No

As nouns, cell organ is a hypernym of cilium; that is, cell organ 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
cell organ: a specialized part of a cell; analogous to an organ

Other hypernyms of cilium include cell organelle, organelle.

cilium (noun)	cell organ (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