偉業|いぎょうigyou[0]heiban (flat)

1. noungreat achievement; great feat; great work; great undertaking
   人間にんげんは動物どうぶつよりはるかに多おおくの偉業いぎょうをなしてきたのである。↗

   Human beings have achieved a lot more than animals.

• Synonym功績こうせきNeutralRefers to contributions to society or an organization, as in 「功績を称える」. It stresses the contribution made, while 「偉業」 stresses the greatness of the feat itself.
• Synonym手柄てがらNeutralA creditable deed that earns praise, common in speech as 「お手柄」. It stresses being credited for a deed, while 「偉業」 stresses how great the achievement itself is.
• Synonym功名こうみょうNeutralWinning renown by performing a deed, as in 「功名を立てる」 or 「功名心」. It stresses merit and fame, while 「偉業」 stresses the greatness of the achievement.
• Synonym功こうNeutralMainly consideration for others; it can also mean the toil or merit of serving someone, but it does not denote a great achievement — use 「偉業」 or 「功績」.
• Synonym勲いさおWrittenRead 「いさお」 and means distinguished service or merit. Archaic and literary, rarely used today; say 「功績」 or 「偉業」 in everyday speech.
• Synonym偉勲いくんWrittenMeans great merit or distinguished service. Highly formal written prose, used mostly in commendations; in everyday language say 「偉業」 or 「功績」.
• Synonym功業こうぎょうWrittenAn undertaking marked by outstanding merit. Written and fairly rare; in everyday use say 「偉業」.
• Synonym偉烈いれつWrittenOutstanding feats or merits. Extremely formal written prose, not used in everyday life; 「偉業」 is the usual word.
• Synonym事績じせきWrittenThe deeds and merits a person has achieved. Somewhat written, often in biographies, and does not stress greatness.
• Synonym大功たいこうWrittenA great deed or major undertaking. Written and fairly rare; in everyday use say 「偉業」.
• Related業績ぎょうせきNeutralResults achieved in work or research, as in 「業績が上がる」; also a company's performance. It need not be anything great.
• Antonym失敗しっぱいNeutralFailure or a mistake — the opposite of 「偉業」, which is a great feat brought off successfully.

Use 「偉業」 for a great achievement, as in 「世界初の偉業」. For contributions to society say 「功績」, for research or work results 「業績」, and for earning credit 「手柄」. 「偉勲」「功業」「偉烈」「大功」 are formal written words. 「功」 (いたわり) mainly means consideration for others; its sense of toil or merit in serving someone is not the word for a great achievement. 「失敗」 is the antonym.

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

1. 素晴すばらしく、優すぐれた仕事しごとや業績ぎょうせきのこと。