協賛|きょうさんkyousan[0]heiban (flat)

1. noun, suru verb, transitive verb, intransitive verbsupport; mutual aid; cooperation; approval; authorization; authorisation

• Synonym援助えんじょNeutralNeutral. Relief-style aid, as in 「経済援助」; it helps those in trouble, while 「協賛」 endorses an activity and backs it with cooperation or sponsorship.
• Synonym支援しえんNeutralNeutral. Broad support and assistance, as in 「被災地支援」; its range is wide and not limited to sponsoring an activity, unlike 「協賛」.
• Synonym応援おうえんNeutralNeutral. Cheering and moral support, as in 「チームを応援」; it leans toward spiritual encouragement, not 「協賛」's endorsement plus sponsorship.
• Synonym助成じょせいWrittenWritten/formal prose. Funding subsidies, from public bodies or private foundations alike, as in 「研究助成金」; it stresses money grants.
• Synonym賛助さんじょWrittenWritten/formal prose. Endorsing a cause's aims and helping it, as in 「賛助会員」; close to 「協賛」 but mostly seen in group memberships.
• Synonym助力じょりょくWrittenWritten/formal prose. Lending a hand, in manpower or money; 「協賛」 specifically means endorsing an activity and sponsoring it.
• Synonym支持しじNeutralNeutral. Backing a person or position, as in 「支持率」; it is about declaring a stance and need not involve actual cooperation like 「協賛」.
• Synonym後援こうえんWrittenWritten/formal prose. Backing from behind, with money or manpower, as in 「後援会」「文化庁後援」; 「協賛」 stresses endorsing an activity and funding it.
• Synonym後押しあとおしNeutralNeutral. Pushing something along, as in 「政策の後押し」; it leans toward encouragement and momentum rather than sponsorship.
• SynonymサポートNeutralNeutral. Loanword for support, as in 「サポート体制」; it leans colloquial and everyday, versus 「協賛」's formal endorsement.
• Related援護えんごWrittenWritten/formal prose. Covering and protecting someone, as in 「援護射撃」; it leans military or rescue contexts, not event sponsorship.
• Related後ろ盾うしろだてNeutralNeutral. A powerful backer or patron, as in 「強力な後ろ盾」; it points to an influential supporter behind you rather than the act of sponsoring.
• Related扶助ふじょWrittenWritten/formal prose. Relief and support for living, as in 「相互扶助」; it leans toward livelihood assistance, unlike 「協賛」.
• Related加勢かせいNeutralNeutral. Joining one side to help out, as in 「加勢に行く」; it leans toward pitching in or reinforcing, not endorsing and funding an event.
• Related力添えちからぞえNeutralNeutral. Often used in honorific phrases, as in 「お力添えを賜る」; a courteous word for generous help.
• Related手助けてだすけCasualColloquial. Everyday helping out, as in 「家事の手助け」; it leans toward daily-life tasks, not formal sponsorship.
• Antonym反対はんたいNeutralNeutral. Opposition — the direct opposite of 「協賛」's endorsement and support.
• Antonym妨害ぼうがいWrittenWritten/formal prose. Obstruction or interference — the opposite of 「協賛」's cooperation.

Use 「協賛」 for agreeing with a project or activity and backing it with cooperation or sponsorship, as in 「協賛企業」「協賛金」. For backing from behind, say 「後援」; for funding subsidies, 「助成」. The opposites are 「反対」 and 「妨害」.

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

1. ある事業じぎょうや活動かつどう、計画けいかくなどに賛同さんどうし、協力きょうりょくや後援こうえんをすること。