Denshi Jisho — Online Japanese dictionary

みつ 1: density; thickness;
2: secrecy;
3: minute; fine
Noun, Na-adjective 
かみつ overcrowding; crowded; congestion
Common word, Na-adjective, Noun, No-adjective 
きみつ secrecy; highly classified information
Common word, Noun 
ひそか secret; private; surreptitious
Common word, Na-adjective, Noun 
ひみつ secret; secrecy
Common word, Na-adjective, Noun, No-adjective 
みつど density
Common word, Noun 
みつゆ smuggling; contraband trade
Common word, Noun, Suru verb 
きみつ airtight
Na-adjective, Noun, No-adjective 
そみつ coarseness and fineness; sparse or dense (growth)
Noun 
そみつ coarseness and fineness; sparse or dense (growth)
Noun 
ちみつ minute; fine; delicate; accurate; elaborate
Na-adjective, Noun 
使 みっし secret messenger
Noun 
みっぷ lover (of a married woman)
Noun 
みつが detailed drawing or picture
Noun 
みつぎ secret rites; secrets
Noun 
みつぎ secret conference
Noun, Suru verb 
みつご talking in whispers; confidential words
Noun, Suru verb 
みつじ a secret
Noun 
ゆみつ oil tight (seal, joint, etc.)
No-adjective 
きんみつ rigour; rigor; closeness; compactness; tightly knit
Common word, Na-adjective, Noun 
げんみつ strict; close
Common word, Na-adjective, Noun 
しんみつ intimacy; friendship
Common word, Na-adjective, Noun 
せいみつ precise; exact; detailed; minute; close
Common word, Na-adjective, Noun 
みっこう smuggling
Common word, Noun, Suru verb 
みっしつ 1: room that cannot be entered (i.e. because it's locked from the inside);
2: secret room
Common word, Noun 
みっせつ related; connected; close; intimate
Common word, Na-adjective, Noun 

Found 202 words. Page one, two, three, four, five, six, seven, eight

You can also

Look up kanji details for *密*.

Try a Yahoo Jisho search for *密* .
Try a Goo Jisho search for *密* .
Try a Google search for *密* .