salvo
Concise Oxford English Dictionary © 2008 Oxford University Press:
salvo/ˈsalvəʊ/
▶noun (pl. salvos or salvoes)
- 1 a simultaneous discharge of artillery or other guns in a battle.
- 2 a sudden vigorous or aggressive series of acts.
– origin C16: from Fr. salve, Ital. salva ‘salutation’.
'salvo' also found in these Oxford entries:

