| 同じ | おなじ | same; identical; equal; alike | n5 |
| 同時に | どうじに | at the same time; at once; simultaneously; concurrently | |
| 同様 | どうよう | same; similar; (just) like; equal | n3 |
| 同じく | おなじく | in the same way; like; likewise; similarly | n3 |
| 同情 | どうじょう | sympathy; compassion; pity | n2 |
| 一同 | いちどう | all present; all concerned; all of us | |
| 共同 | きょうどう | cooperation; collaboration; association; partnership | n2 |
| 同士 | どうし | fellow; mutual; companion; comrade | n2 |
| 同志 | どうし | like-mindedness; (being of the) same mind; shared sentiment; comrade | n1 |
| 同一 | どういつ | identical; same; one and the same; equal | n2 |
| 同意 | どうい | agreement; consent; approval; assent | n2 |
| 同僚 | どうりょう | coworker; co-worker; colleague; associate | n2 |
| 同感 | どうかん | same feeling; same sentiment; same opinion; sympathy | |
| 同年 | どうねん | that year; same year; same age | |
| 同 | どう | the same; the said; likewise | n1 |
| 同行 | どうこう | accompanying (someone); going with; travelling together; the same bank | n1 |
| 同時 | どうじ | same time; simultaneous; concurrent; synchronous | n3 |
| 同人 | どうじん | same person; said person; the person in question; coterie | |
| 同盟 | どうめい | alliance; union; league | |
| 同胞 | どうほう | brethren; brothers; fellow countrymen; fellowman | |
| 同伴 | どうはん | accompanying; being accompanied by; going with | n1 |
| 混同 | こんどう | confusion; mixing; merger | n1 |
| 同居 | どうきょ | living together; coexistence | n2 |
| 同然 | どうぜん | just like; (virtually) no different from; (almost) the same as; as good as (e.g. dead, settled) | n1 |
| 同棲 | どうせい | cohabitation (esp. of an unmarried couple); living together | |
| 同様に | どうように | identically; in the (exact) same way; similarly | |
| 同心 | どうしん | concentricity; same mind; unanimity; policeman | |
| 同等 | どうとう | equality; equal; same rights; same rank | n2 |
| 同類 | どうるい | the same kind; accomplice; partner | n1 |
| 合同 | ごうどう | combination; union; joining; incorporation | n2 |
| 同化 | どうか | assimilation; absorption; adaptation; assimilation | n1 |
| 同氏 | どうし | the said person; he; she; same surname | n2 |
| 同級生 | どうきゅうせい | classmate | n3 |
| 同日 | どうじつ | the same day | n2 |
| 同郷 | どうきょう | (being from the) same town (province, birthplace, etc.) | n2 |
| 同道 | どうどう | going with; accompanying | n1 |
| 協同 | きょうどう | cooperation; collaboration; association; partnership | n2 |
| 同席 | どうせき | being present (at the same meeting, occasion, etc.); attendance (with); sitting with; sitting next to | n3 |
| 同国 | どうこく | same country; same province; the (said) country | |
| 同勢 | どうぜい | party; company | |
| 同窓 | どうそう | being a graduate of the same school; person who went to the same school; fellow alumnus | |
| 同君 | どうくん | the person heretofore mentioned; that person | |
| 賛同 | さんどう | approval; endorsement | n1 |
| 同族 | どうぞく | same family (race, tribe) | |
| 同級 | どうきゅう | the same grade; same class | |
| 同社 | どうしゃ | the same company; the said firm; the same (Shinto) shrine; the said shrine | |
| 同乗 | どうじょう | riding together; riding with | n2 |
| 同輩 | どうはい | fellows; comrade; colleague; one's equal | |
| 同宿 | どうしゅく | lodging in the same place | |
| 同業 | どうぎょう | same trade; same business; same profession | |
| 同種 | どうしゅ | same kind; same sort; same species; same race | |
| 異口同音 | いくどうおん | (saying) with one voice; unanimously; in chorus; in unison | |
| 同室 | どうしつ | same room; sharing a room; occupying the same room | n1 |
| 同名 | どうめい | same name; homonym | |
| 同年輩 | どうねんぱい | persons of the same age | |
| 大同小異 | だいどうしょうい | essentially the same with only minor differences | |
| 同義 | どうぎ | same meaning; synonymy | n1 |
| 同性 | どうせい | same sex | |
| 同月 | どうげつ | the same month | |
| 同書 | どうしょ | the same book; the said book; ibid. | |
| 異同 | いどう | difference | n3 |
| 同列 | どうれつ | same row; same line; same file; same rank | n1 |
| 同上 | どうじょう | same as above; ditto; ibid. | n2 |
| 同格 | どうかく | the same rank; equality; apposition | |
| 同地 | どうち | the same place; that place | |
| 同体 | どうたい | as one flesh or body; simultaneously | n1 |
| 同好 | どうこう | similar tastes | n1 |
| 同期 | どうき | same period; corresponding period; same year (of graduation, entering a company, etc.); contemporary | n1 |
| 同音 | どうおん | homophony; same pronunciation; same sound; unison | |
| 雷同 | らいどう | following blindly | |
| 同い年 | おないどし | the same age | |
| 同門 | どうもん | fellow student | |
| 同役 | どうやく | colleague | |
| 同断 | どうだん | the same; ditto | |
| 同所 | どうしょ | the same place; the same address; the said place | |
| 大同 | だいどう | general resemblance; being largely the same; uniting with a common goal; Daidō era (806.5.18-810.9.19) | |
| 同姓 | どうせい | same surname | |
| 同家 | どうけ | the said family; the same family | |
| 同封 | どうふう | enclosing (e.g. with a letter) | n2 |
| 同調 | どうちょう | conformity; alignment; agreement; sympathy | n1 |
| 敵同士 | かたきどうし | mutual enemies | |
| 同罪 | どうざい | same crime; being equally guilty; bearing the same amount of responsibility | |
| 同車 | どうしゃ | riding in the same car; same car | |
| 同人誌 | どうじんし | dōjinshi; magazine published by like-minded people; fanzine; zine | |
| 同船 | どうせん | the same ship; taking the same ship | |
| 同腹 | どうふく | born of the same mother; kindred spirits | |
| 同義語 | どうぎご | synonym | |
| 同型 | どうけい | isomorphism; same shape; same type; same pattern | |
| 不同 | ふどう | difference; diversity; irregularity; disorder | |
| 同座 | どうざ | sitting together; the same theater (theatre); involvement; entanglement | |
| 同誌 | どうし | the same magazine; the same journal; the said magazine; the said journal | n2 |
| 同数 | どうすう | same number | |
| 同権 | どうけん | the same rights; equal rights | |
| 同村 | どうそん | same village; that village | |
| 同夜 | どうや | the same night; that night | |
| 同市 | どうし | same city | n2 |
| 同性愛 | どうせいあい | homosexuality; homosexual love | |
| 同質 | どうしつ | same quality; same nature; homogeneous | n1 |
| 同朋 | どうぼう | companions; fellows | |
| 同時期 | どうじき | same time (period) | |