We don't have synonyms for fillibustered yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are filibusterer, filibustered and fillibuster.
(v) :
Alternative form of filibuster. [To take part in a private military action in a foreign country.]
(n) :
Alternative form of filibuster. [(historical) A mercenary soldier; a freebooter; specifically, a mercenary who travelled illegally in an organized group from the United States to a country in Central America or the Spanish West Indies in the mid-19th century seeking economic and political benefits through armed force.]
(v) :
Alternative form of filibuster. [To take part in a private military action in a foreign country.]
(n) :
Alternative form of filibuster. [(historical) A mercenary soldier; a freebooter; specifically, a mercenary who travelled illegally in an organized group from the United States to a country in Central America or the Spanish West Indies in the mid-19th century seeking economic and political benefits through armed force.]