Denshi Jisho — Online Japanese dictionary

に indicates such things as location of person or thing, location of short-term action, etc.
Common word, Particle 
ニ 4th in a sequence denoted by the iroha system; 4th note in the diatonic scale (used in key names, etc.)
Noun 
丹 に red earth (i.e. containing cinnabar or minium); vermilion
Common word, Noun 
二 に two
Common word, Numeric 
荷 に 1: load; baggage; cargo; freight; goods;
2: burden; responsibility
Common word, Noun 
似 に takes after (his mother)
Suffix 
土 に soil (esp. reddish soil)
Noun, Archaism 
尼 に bhikkhuni (fully ordained Buddhist nun)
Noun, Noun suffix, Abbreviation 
弐 に two (used in legal documents)
Numeric 
２ に two
Numeric 
にて indicates location of action (formal literary form of "de"); at; in
Common word, Particle 
ニー knee
Common word, Noun 
ニシ small spiral-shelled snail
Noun, Usually written using kana alone 
ニス varnish
Noun, Abbreviation 
には for (in regard to); in order to
Particle 
にべ 1: (Usually written using kana alone) drum; croaker (any fish of the family Sciaenidae);
2: (Usually written using kana alone) Nibe croaker (Nibea mitsukurii)
Noun 
ニベ 1: (Usually written using kana alone) drum; croaker (any fish of the family Sciaenidae);
2: (Usually written using kana alone) Nibe croaker (Nibea mitsukurii)
Noun 
にも also; too; not ... either; as well; even
Expression 
にゃ 1: if not ... (negative conditional);
2: for (in regard to); in order to
Expression 
ニラ Chinese chive; garlic chive (Allium tuberosum)
Noun, Usually written using kana alone 
ニレ elm tree (esp. the Japanese elm, Ulmus davidiana var. japonica)
Noun, Usually written using kana alone 
肉 にく 1: flesh;
2: meat;
3: the physical body (as opposed to the spirit);
4: thickness;
5: ink pad
Common word, Noun 
西 にし west
Common word, Noun 
虹 にじ rainbow
Common word, Noun 
偽 にせ 1: imitation; fake; phony; counterfeit; forged; bogus; sham;
2: (Prefix) pseudo-
Common word, No-adjective, Noun 
庭 にわ garden
Common word, Noun 

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