加農 is read as かのん (kanon) and means cannon.
かのん
kanon
かのうほう
cannon (esp. high-velocity artillery)
かげん
addition and subtraction
かさん
addition
かたん
support
かあつ
increasing pressure
かせい
assistance
かしゅう
California (state)
かれい
aging
かりょう
medical treatment
かひつ
improvement (to a piece of writing or painting)
かほうてき
additive
かじしん
altruistic manifested form of Mahavairocana (New Shingon)