eyelash vs cilium

eyelash and cilium both are nouns.

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

As nouns, eyelash and cilium are synonyms defined as:

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

Other synonyms of eyelash include lash.

eyelash (noun)	cilium (noun)
any of the short curved hairs that grow from the edges of the eyelids	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