フェイクfeiku

1. noun, suru verbfake
2. noun, musicimprovisation (in jazz music, singing, etc.); ad-lib; vocal run; vocal riff
3. noun, sportsfeint (in American football)

• Synonym偽物にせものNeutralThe everyday word for counterfeit goods and fakes. 「フェイク」 is a loanword that also covers fake news, faux fur, jazz improvisation and feints.
• Synonym偽にせNeutralFake or imitation, mostly a prefix or used with 「の」, as in 「偽札」「偽の情報」. For fake goods on its own, 「偽物」 is the usual word.
• SynonymインチキCasualColloquial; stresses cheating and trickery, as in 「インチキ商法」, and can also mean fake goods. Carries stronger condemnation than 「フェイク」.
• SynonymいかものCasualColloquial for fakes, but also means odd, curious things and often carries a mocking tone, as in 「いか物食い」; not the usual word for a fake.
• Synonymまがい物まがいものNeutralAn imitation made to look like the real thing, stressing copied appearance, as in 「まがい物の宝石」. 「フェイク」 also covers non-physical fakes such as news.
• SynonymいかさまNeutralCheating or a rigged deal, as in 「いかさま師」. Its adverbial sense 'surely, certainly' is archaic and essentially unused in modern Japanese.
• SynonymまやかしNeutralDeceives with false appearances; said of speech or tactics that are hollow and untrue, as in 「まやかしの言葉」. More damning than 「フェイク」.
• SynonymまがいNeutralImitation or pretence, mostly a suffix after nouns, as in 「本物紛い」「詐欺紛い」, for things that merely pass for the real thing; rarely stands alone.
• Synonym偽造品ぎぞうひんWrittenWritten/formal prose: goods or documents illegally forged, such as counterfeit money or fake IDs; a legal and news-register word. 「フェイク」 need not involve illegality.
• SynonymがせCasualSlang in origin, mostly for false information, often 「ガセネタ」; can also mean fake goods. More heavily colloquial than 「フェイク」.
• Antonym本物ほんものNeutralThe genuine article, the real thing — the opposite of 「フェイク」 in its fake-goods sense. Also praises a person or thing as the real deal, truly first-rate.
• AntonymリアルNeutralReal, realistic — the opposite of 「フェイク」's falseness, mostly adjectival, as in 「リアルな描写」. For genuine articles, 「本物」 is the word.

Use 「フェイク」 for fake news, faux fur and similar loanword uses, as in 「フェイクニュース」. For ordinary fake goods say 「偽物」; for cheating tricks 「インチキ」; for illegal forgeries 「偽造品」. The opposite is 「本物」.

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

1. 偽物にせもの。模造品もぞうひん。見せ掛みせかけ。
2. ジャズで曲きょくを即興的そっきょうてきに演奏えんそうすること。