There are many different synonyms for the phrase "Armata Corsa." Some options might include "Corsican Army" or "Corsican Forces," both of which would emphasize the military aspect of the group. Other possible synonyms might include "Corsican Rebellion" or "Corsican Uprising," both of which would suggest a more political or social-justice-oriented motive for the group's actions. Depending on the context of the phrase, other synonyms might be more appropriate - for example, perhaps "Corsican Resistance" or "Corsican Insurgency" might be more fitting if the group is working to resist an external force or occupation. Ultimately, the best synonym would depend on the specific nuances of the phrase and the context in which it is being used.