ampul vs ampoule

ampul and ampoule both are nouns.

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

As nouns, ampul and ampoule are synonyms defined as:

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

Other synonyms of ampul include ampule, phial, vial.

ampul (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)