ampule vs phial

ampule and phial both are nouns.

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

As nouns, ampule and phial are synonyms defined as:

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

Other synonyms of ampule include ampoule, ampul, vial.

ampule (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)