ユニオンyunion

1. noununion

• Synonym連合れんごうWrittenWritten/formal prose. A union or confederation of bodies organized for a purpose, as in 「国際連合」; 「ユニオン」 mostly refers to labor unions or the names of united organizations.
• Synonym同盟どうめいNeutralAn alliance or league, as in 「軍事同盟」; it centers on pacts between nations or groups, while 「ユニオン」 usually means a labor union.
• Synonym労働組合ろうどうくみあいNeutralThe everyday word for a labor union, by far the most common; 「ユニオン」 mostly appears in the names of unions and organizations.
• Synonym労組ろうそNeutralShort for 「労働組合」; seen often in news headlines. 「ユニオン」 is mostly used in names.
• RelatedトレードユニオンNeutralA loanword for a trade union with an Anglo-American flavor; rarely used. In everyday speech say 「労働組合」.
• RelatedレーバーユニオンNeutralA loanword for a labor union, uncommon in daily use; 「労働組合」 is the usual term, and 「ユニオン」 alone can also mean a union.
• Related労働団体ろうどうだんたいWrittenWritten/formal prose. A broad term for labor bodies such as unions and their federations; wider in scope than a single union.
• Antonym分裂ぶんれつNeutralA split or division; it is the opposite of 「ユニオン」 in the sense of uniting or coming together.

For a labor union, say 「労働組合」 (short form 「労組」); 「ユニオン」 mostly appears in the names of unions or united organizations. Use 「連合」 for a union or confederation and 「同盟」 for an alliance between nations or groups.

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

1. 連合れんごう。