As nouns the difference between cannoneer and cannonier
is that cannoneer is a person who tends and operates a piece of artillery, especially a cannon while cannonier is alternative form of cannoneer.
cannoneer
English
Noun
(
en noun)
(military) A person who tends and operates a piece of artillery, especially a cannon.
- Luckily, the cannoneer was only mildly injured when his cannon malfunctioned.