Denshi Jisho — Online Japanese dictionary

ふく 1: diplo-; double;
2: (Noun) (Abbreviation) doubles (tennis, etc.);
3: (Abbreviation) place betting (in horse racing, etc.)
Noun, Prefix 
ふくり compound interest
Common word, Noun 
ふくい lined garment
Noun 
ふくざ two-seater
Noun 
ふくし double vision; polyopia
Noun 
ふくそ 1: complex;
2: (Noun) (Mathematical term) complex (number)
No-adjective 
ふくごう composite; combined; complex
Common word, Noun, Suru verb, No-adjective 
ふくざつ complex; complicated
Common word, Na-adjective 
ふくしゃ copy; duplicate
Common word, Noun, Suru verb 
ふくすう several; plural; plurality; multiple
Common word, Noun, No-adjective 
ふくせい reproduction; duplication; reprinting
Common word, Noun, Suru verb, No-adjective 
ふくえん double salt
Noun 
ふくおん compound note (on a harmonica)
Noun 
ふくがん compound eyes
Noun 
ふくこん polygamy
Noun 
ふくごう double sign (e.g. plusminus)
Noun 
ふくしき double-entry (e.g. bookkeeping)
Noun 
ふくせい multiple star
Noun 
ふくせん duopoly
Noun 
ふくせん double track; two-track line
Noun 
ふくそう diploid phase
Noun, No-adjective 
ふくでん restoration of power (e.g. after power failure)
Irregular kanji usage, Noun 
ふくぶん complex sentence
Noun, Linguistic term 
ふくほう compound drug
Noun 
ふくほん duplicate; copy
Noun 
ふくよう compound leaf; biplane
Noun 
座機 ふくざき two-seater aeroplane; two-seater airplane
Noun 
ふくしょう placing bets
Noun 
雑さ ふくざつさ complexity
Common word, Noun 
号化 ふくごうか decryption; decipherment; decoding
Irregular kanji usage, Noun, Suru verb, Computer terminology 

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