ampoule vs phial

ampoule and phial both are nouns.

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

As nouns, ampoule and phial are synonyms defined as:

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

Other synonyms of ampoule include ampul, ampule, vial.

ampoule (noun)	phial (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)