Flotillas are groups of ships or boats that are commonly used for military or commercial purposes. However, there are several synonyms that can be used to avoid repetition in writing and speech. Some possible synonyms for flotillas might include armadas, fleets, squadrons, task forces, or even convoys. Each of these alternatives carries with it slightly different connotations and implications, but all refer to groups of watercraft that are operating together in some capacity. By using synonyms like these, writers and speakers can make their language more varied and interesting, while still conveying the same basic meaning and ideas.