連合・聯合|れんごうrengou[0]heiban (flat)

1. noun, suru verb, transitive verb, intransitive verbunion; combination; alliance; confederation; coalition
   戦争せんそうは連合軍れんごうぐんの勝利しょうりに終おわった。↗

   The war ended in victory for the Allied Powers.
2. noun, psychologyassociation
3. nounRENGO (Japanese Trade Union Confederation)abbr. of 日本労働組合総連合会

• Synonym同盟どうめいNeutralUsed for concluded alliances such as 「日米同盟」 and 「軍事同盟」; it stresses a pact of mutual aid, while 「連合」 stresses an organized body.
• SynonymユニオンNeutralLoanword for a union or alliance, as in 「ユニオンジャック」; in everyday use it mostly appears in the names of labor unions.
• SynonymリーグNeutralLoanword for a league, as in 「Jリーグ」; mostly used for sports competitions, though it can also mean an alliance.
• Synonym結合けつごうNeutralMeans combining or linking, as in 「分子の結合」; often used in chemistry and technical fields.
• Synonym合同ごうどうNeutralMeans combining to do something jointly, as in 「合同練習」 or 「合同庁舎」; it stresses joint action.
• Synonym連盟れんめいNeutralMeans a league or federation, as in 「国際連盟」 or 「野球連盟」; mostly used in the formal names of organizations.
• Synonym連立れんりつNeutralRefers to coalition government, as in 「連立政権」; used mainly for political parties.
• SynonymアライアンスNeutralLoanword for alliances between companies or airlines; mainly a business term.
• Related共同きょうどうNeutralMeans doing something together, as in 「共同研究」; it stresses joint work and does not require forming an organization.
• Related団結だんけつNeutralMeans uniting in solidarity, as in 「一致団結」; it stresses mental or spiritual cohesion.
• Related合体がったいNeutralMeans merging into one body, as in 「合体ロボ」; often colloquial, common in anime and manga.
• Related合併がっぺいNeutralRefers to mergers of companies or municipalities into one body, as in 「吸収合併」.
• Related協会きょうかいNeutralMeans an association or society, as in 「日本相撲協会」; it stresses a member-based organization.
• Related提携ていけいNeutralRefers to business tie-ups between companies, as in 「業務提携」; the partners each stay independent.
• Related結束けっそくNeutralMeans solidarity or pulling together, as in 「結束を固める」; it stresses cohesion within a group.
• Related併合へいごうNeutralRefers to annexing territory or merging organizations, as in 「領土の併合」; often carries a coercive nuance.
• Related統一とういつNeutralMeans unifying or making things uniform; it stresses bringing parts together into a single whole.
• Related一体化いったいかNeutralMeans becoming one integrated whole, as in 「官民一体化」; it stresses there being no distinction between the parts.
• Related合一ごういつWrittenA written term for merging into one, seen mostly in philosophical set phrases such as 「知行合一」.
• Antonym単独たんどくNeutralMeans acting alone or singly, the opposite of joining together in 「連合」.
• Antonym分離ぶんりNeutralMeans separating or splitting apart, the opposite of the union expressed by 「連合」.

Use 「連合」 when multiple parties form an organized body for a common purpose, as in 「国際連合」 or 「連合軍」. For a pact between nations choose 「同盟」; for formal organization names 「連盟」; for parties governing in coalition 「連立」; for business tie-ups 「提携」. The opposite is 「単独」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. ある事ことを目的もくてきとする二ふたつ以上いじょうのものが一ひとつに組織化そしきかすること。または、その組織そしきのこと。