Denshi Jisho — Online Japanese dictionary

あ 1: Ah! (expression of surprise, recollection, etc.); Oh!;
2: Hey! (to get someone's attention)
Interjection 
亜 あ 1: sub-;
2: -ous (indicating a low oxidation state); -ite
Prefix 
吾 あ I; me
Out-dated or obsolete kana, Pronoun, No-adjective 
唖 あ muteness; speech impairment
Noun 
彼 あ 1:
2: (Usually written using kana alone) that (indicating something distant from both speaker and listener (in space, time or psychologically), or something understood without naming it directly);
3: that person (used to refer to one's equals or inferiors);
4: (Archaism) over there; (Interjection) hey (expression of surprise or suspicion); eh?;
5: (Noun) that (something mentioned before which is distant psychologically or in terms of time)
Out-dated or obsolete kana, Noun 
我 あ I; me
Out-dated or obsolete kana, Pronoun, No-adjective 
ああ like that (used for something or someone distant from both speaker and listener); so
Common word, Adverb 
アド 1: ad; advertisement;
2: (Abbreviation) address
Common word, Noun 
アナ announcer
Common word, Noun, Abbreviation 
あの say; well; errr ...
Common word, Interjection 
アマ amateur
Common word, Noun, Abbreviation 
あら oh; ah
Common word, Interjection, Female term or language 
アイ eye
Noun 
アギ asafetida (Ferula assafoetida)
Noun, Usually written using kana alone 
アシ common reed (Phragmites australis)
Noun, No-adjective, Usually written using kana alone 
アシ assistant
Noun, Suru verb, Abbreviation 
アジ agitation
Noun, Abbreviation 
アジ horse mackerel (Carangidae spp., esp. the Japanese horse mackerel, Trachurus japonicus); jack mackerel; pompano; scad
Noun, Usually written using kana alone 
アッ oh; ah
Interjection 
アト atto-; 10^-18
Noun, Prefix 
アド secondary or supporting actor in a noh or kyogen play
Noun, Usually written using kana alone 
アビ red-throated loon (Gavia stellata)
Noun, Usually written using kana alone 
アブ horsefly; gadfly
Noun, Usually written using kana alone 
アホ fool; simpleton; idiot
Na-adjective, Noun, Sensitive 
アポ appointment
Noun, Abbreviation 
アマ flax (Linum usitatissimum); linseed
Noun, No-adjective 

Found 8202 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, 94, 95, 96, 97, 98, 99

You can also

Look up kanji details for 亜 あ.

Try a Yahoo Jisho search for 亜 あ .
Try a Goo Jisho search for 亜 あ .
Try a Google search for 亜 あ .