ampule vs ampoule

ampule and ampoule both are nouns.

Word	Noun	Adjective	Verb	Adverb
ampule	Yes	No	No	No
ampoule	Yes	No	No	No

As nouns, ampule and ampoule are synonyms defined as:

ampule and ampoule: a small bottle that contains a drug (especially a sealed sterile container for injection by needle)

Other synonyms of ampule include ampul, phial, vial.

ampule (noun)	ampoule (noun)
a small bottle that contains a drug (especially a sealed sterile container for injection by needle)	a small bottle that contains a drug (especially a sealed sterile container for injection by needle)