共著|きょうちょkyoucho[1]atamadaka (head-high)

1. nounjoint authorship; co-authorship; collaboration; joint work

• Synonym共作きょうさくNeutralJoint creation of a work, including music and painting; broader than 「共著」, which covers only written works.
• Related二人三脚ににんさんきゃくNeutralMetaphor for two people working in close, single-minded partnership; carries emotional color and is not specific to writing.
• RelatedコラボCasualColloquial loanword for people or groups teaming up on a work or project; typical of products and performances. 「共著」 is strictly for co-writing texts.
• Related共同研究きょうどうけんきゅうNeutralJoint research by multiple researchers; the emphasis is on the research process, and a book need not result.
• Antonym単著たんちょWrittenWritten/formal term for a work written by a single author; the opposite of co-written 「共著」.

Use 「共著」 for co-writing a book or paper, as in 「共著論文」 or 「…との共著」. For joint creation of works say 「共作」, for joint research 「共同研究」, and for collaborations on projects 「コラボ」; 「単著」 is the opposite.

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

1. 書物しょもつを二人ふたり以上いじょうで著あらわすこと。また、その書物しょもつ。