vial vs ampule

vial and ampule both are nouns.

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

As nouns, vial and ampule are synonyms defined as:

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

Other synonyms of vial include ampoule, ampul, phial.

vial (noun)	ampule (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)