We don't have synonyms for bull mooser yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are bull moose.
(n) :
Alternative form of Bull Moose. [(historical) A member of the Progressive Party (United States, 1912), an American political party formed by former President Theodore Roosevelt after a split in the Republican Party.]
(n) :
Alternative form of Bull Moose. [(historical) A member of the Progressive Party (United States, 1912), an American political party formed by former President Theodore Roosevelt after a split in the Republican Party.]