cilium vs eyelash

cilium and eyelash both are nouns.

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

As nouns, cilium and eyelash are synonyms defined as:

cilium and eyelash: any of the short curved hairs that grow from the edges of the eyelids

Other synonyms of cilium include lash.

cilium (noun)	eyelash (noun)
a hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organisms	any of the short curved hairs that grow from the edges of the eyelids
any of the short curved hairs that grow from the edges of the eyelids