Denshi Jisho — Online Japanese dictionary

まる 1: circle;
2: (Prefix) full (e.g. month, day, etc.);
3: perfection; purity;
4: suffix for ship names
Common word, Noun 
がん 1: fishball; meatball;
2: pill
Noun, Noun suffix 
まるい 1: round; circular; spherical;
2: harmonious; calm
Common word, Adjective 
まるた log
Common word, Noun 
まるで quite; entirely; completely; at all; as if; as though; so to speak; just like
Common word, Adverb, Usually written using kana alone 
まるみ roundness; rotundity
Common word, Noun 
おまる bedpan; chamber pot; potty
Noun, Usually written using kana alone 
おまる bedpan; chamber pot; potty
Noun, Usually written using kana alone 
まるき log
Noun 
まるじ rounded handwriting
Noun 
まるに boiling something whole (e.g. vegetable, fish); cooking something whole
Noun 
まるひ confidential; secret; classified
Noun, No-adjective 
まるみ roundness; rotundity
Noun 
まるめ rounding
Noun, Computer terminology 
まろい 1: round; circular; spherical;
2: harmonious; calm
Out-dated or obsolete kana, Adjective 
いちがん lump; (into) one
Common word, Noun 
だんがん bullet; shot; shell
Common word, Noun 
がんざい pill
Noun, No-adjective 
がんやく pill
Noun, No-adjective 
くろまる black spot; black dot; bull's-eye; failure
Noun 
こうがん testicles; testes; balls
Noun, No-adjective 
たまきず bullet wound; gunshot wound
Irregular kanji usage, Noun 
どうまる medieval armour lacking a solid breastplate and sleeves
Noun 
どうまる medieval armour lacking a solid breastplate and sleeves
Noun 
はなまる flower circle (equiv. of gold star awarded to kids for good work at school)
Noun 
ほうがん shell; shots; cannon ball
Noun 
ほんまる inner citadel
Noun 
まるあな round hole
Noun 

Found 195 words. Page one, two, three, four, five, six, seven

You can also

Look up kanji details for *丸*.

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