We don't have synonyms for imperio yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are imperil, imperia and impero.
""Boating and fishing groups contend that the 130 [wind energy] towers would be a navigation hazard and offshore construction would imperil the fisheries." — "Wind Out of Their Sails", Jeffrey Winters, p. 31, Mechanical Engineering, June 2006"
""Boating and fishing groups contend that the 130 [wind energy] towers would be a navigation hazard and offshore construction would imperil the fisheries." — "Wind Out of Their Sails", Jeffrey Winters, p. 31, Mechanical Engineering, June 2006"