Denshi Jisho — Online Japanese dictionary

本能 ほんのう instinct
Common word, Noun, No-adjective 
本能 ほんのうてき instinctive; instinctual
Na-adjective 
本能寺の変 ほんのうじのへん Honnoji Incident; forced suicide of daimyo Oda Nobunaga by his samurai general Akechi Mitsuhide (June 21, 1582)
Noun 

You can also

Look up kanji details for 本能.

Try a Yahoo Jisho search for 本能 .
Try a Goo Jisho search for 本能 .
Try a Google search for 本能 .