Denshi Jisho — Online Japanese dictionary

四 よん four
Common word, Numeric 
容 よう 1: form; shape; figure;
2: visage
Noun 
庸 よう tax paid to avoid forced labor (ritsuryo period)
Noun 
杳 よう dark; ununderstood; unknown
Taru-adjective, Adverb taking the 'to' particle 
癰 よう carbuncle
Noun, Usually written using kana alone 
益 よう 1: benefit; use; good; advantage; gain;
2: profit; gains
Noun 
葉 よう 1: counter for leaves, pieces of paper, etc.;
2: (Archaism) counter for boats
Suffix, Counter 
要 よう 1: cornerstone; main point; keystone;
2: requirement; need;
3: (Noun or verb acting prenominally) necessary; required
Noun 
慾 よく greed; craving; desire; avarice; wants
Noun 
翌 よく the following; next
Prefix 
翼 よく 1: wing;
2: Chinese "Wings" constellation (one of the 28 mansions);
3: () (Archaism) counter for birds or bird wings
Noun 
縦 よし even if
Adverb, Usually written using kana alone 
芦 よし common reed (Phragmites australis)
Noun, No-adjective, Usually written using kana alone 
葦 よし common reed (Phragmites australis)
Noun, No-adjective, Usually written using kana alone 
葭 よし common reed (Phragmites australis)
Noun, No-adjective, Usually written using kana alone 
蘆 よし common reed (Phragmites australis)
Noun, No-adjective, Usually written using kana alone 
外 よそ 1: another place; somewhere else; strange parts;
2: outside (one's family or group); those people;
3: unrelated matter
Noun 
淀 よど pool (in river)
Noun 
澱 よど pool (in river)
Noun 
米 よね 1: (husked grains of) rice;
2: 88 years old
Out-dated or obsolete kana, Noun 
娵 よめ 1: wife; bride;
2: (one's) daughter-in-law
Noun 
婦 よめ 1: wife; bride;
2: (one's) daughter-in-law
Noun 
４ よん four
Numeric 
良い よい 1: (Usually written using kana alone) good; excellent; fine; nice; pleasant; agreeable;
2: sufficient (can be used to turn down an offer); ready; prepared;
3: profitable (e.g. deal, business offer, etc.); beneficial;
4: OK
Common word, Adjective 
酔い よい drunkenness; intoxication
Common word, Noun 
酔う よう to get drunk; to become intoxicated
Common word, Godan verb with u ending, Intransitive verb 

Found 2418 words. Page one, two, three, four, five, six, seven, eight, nine, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93

You can also

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