eye-lotion vs collyrium

eye-lotion and collyrium both are nouns.

Word	Noun	Adjective	Verb	Adverb
eye-lotion	Yes	No	No	No
collyrium	Yes	No	No	No

As nouns, eye-lotion and collyrium are synonyms defined as:

eye-lotion and collyrium: lotion consisting of a solution used as a cleanser for the eyes

Other synonyms of eye-lotion include eyewash.

eye-lotion (noun)	collyrium (noun)
lotion consisting of a solution used as a cleanser for the eyes	lotion consisting of a solution used as a cleanser for the eyes