Denshi Jisho — Online Japanese dictionary

どう the same; the said; ibid.
Common word, Prefix 
おなじ 1: same; identical; equal; uniform; equivalent; similar; common (origin); changeless; alike;
2: (Adverb) (usu. part of a 'nara' conditional) anyway; anyhow; in either case
Common word, Noun or verb acting prenominally, Noun 
どうい 1: agreement; consent; same opinion; approval;
2: same meaning
Common word, Noun, Suru verb, No-adjective 
どうか 1: assimilation; absorption;
2: anabolism;
3: adaptation
Common word, Noun, Suru verb, No-adjective 
どうき 1: contemporary; corresponding period; same period; same class;
2: synchronous; synchronization
Common word, Adverbial noun, Suru verb, No-adjective 
どうし fellow; mutual; companion; comrade; bonding
Common word, Noun, Noun suffix 
どうし same city
Common word, Noun 
どうし same mind; comrade; kindred soul
Common word, Noun 
どうし the said person; he; she; same person
Common word, Noun 
どうじ simultaneous(ly); concurrent; same time; synchronous; together
Common word, Noun, No-adjective 
どうち the same place; that place
Common word, Noun 
どうや the same night; that night
Common word, Adverbial noun, Temporal noun 
いどう difference
Noun 
どうい the same rank; the same digit
Noun 
どうい similarities and differences
Noun 
どうか equivalent
Noun, No-adjective 
どうき same temperament; same turn of mind
Noun 
どうぎ the same meaning
Na-adjective, Noun, No-adjective 
どうく same ward
Noun 
どうけ the said family; the same family
Noun 
どうご same word
Noun 
どうざ sitting together; the same theater (theatre); involvement; entanglement; implication
Noun, Suru verb 
どうざ sitting together; the same theater (theatre); involvement; entanglement; implication
Noun, Suru verb 
どうし the same newspaper
Noun 
どうし treating alike
Noun, Suru verb 
どうし same magazine
Noun 

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