失敗(しっぱい)

failure

敗北(はいぼく)

defeat

敗(やぶ)れる

to be defeated

敗戦(はいせん)

defeat in war

敗退(はいたい)

elimination; withdrawal after defeat

敗者(はいしゃ)

loser; defeated person

勝敗(しょうはい)

victory or defeat; outcome

惨敗(さんぱい)

crushing defeat

完敗(かんぱい

敗因(はいいん)は準備不足(じゅんびぶそく)だった。

The cause of the defeat was insufficient preparation.

そのチームは決勝(けっしょう)で敗北(はいぼく)した。

That team was defeated in the final.