We don't have synonyms for conus yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are onus, bonus and cons.
(n) :
(chiefly military) Acronym of The continental United States, but is further defined to be the 48 states between Canada and Mexico, including the District of Columbia.
(n) :
(chiefly military) Acronym of The continental United States, but is further defined to be the 48 states between Canada and Mexico, including the District of Columbia.