1) Artillery pieces 2) Ball projectors 3) English Baroque architecture 4) Huge guns 5) Producers of major reports 6) The big guns 
[house] Cannons was a stately home in Little Stanmore, Middlesex, built for James Brydges, 1st Duke of Chandos, between 1713 and 1724 at a cost of £200,000 (equivalent to £{formatnum:{{Inflation|UK|200000|1724|r=-4}}} today{Inflation-fn|UK}) but which in 1747 was razed and its contents dispersed. The name `Cannons` is an obsolete spelling...
• (pl. ) of Cannon
Spray cans. Term that probably originates in Brooklyn, NY.