増加|ぞうかzouka[0]heiban (flat)

1. noun, suru verb, transitive verb, intransitive verbincrease; rise; growth; addition; increment
   犯罪はんざい率りつは着実ちゃくじつに増加ぞうかしている。↗

   The crime rate is rising steadily.

• Synonym増大ぞうだいWrittenWritten word for scale or degree growing, mostly with abstract things like 「負担の増大」; 「増加」 is about sheer quantity.
• Synonym増すますNeutralVerb for quantity or degree increasing, as in 「危険が増す」; a touch more formal than 「増える」.
• Synonym上昇じょうしょうNeutralFor position, figures or levels moving upward — temperature, share prices; 「増加」 is about quantity growing.
• SynonymのびNeutralThe extent of growth or stretching, as in 「売上の伸び」; stresses growth momentum rather than the increase itself.
• Synonym増えるふえるNeutralThe everyday intransitive verb for things growing in number; 「増加」 is a Sino-Japanese noun that leans written.
• Synonym増殖ぞうしょくWrittenWritten word for cells or organisms multiplying, also figuratively for something relentlessly spreading and swelling.
• Synonym増やすふやすNeutralTransitive verb for making numbers grow, as in 「人数を増やす」; 「増加」 is the more written, Sino-Japanese option.
• SynonymアップCasualColloquial loanword for raising or upping something, often suffixal as in 「給料アップ」.
• Synonym伸長しんちょうWrittenWritten word for length or influence stretching, as in 「業績が伸長する」.
• Synonym増量ぞうりょうNeutralAn increase in volume or amount, as in product promos like 「20％増量」 or drug dosages.
• Synonym高まりたかまりNeutralNoun for emotions or atmosphere surging, as in 「緊張の高まり」.
• Synonym増強ぞうきょうWrittenWritten word for adding staff or equipment to build strength, as in 「兵力増強」.
• Synonym増額ぞうがくNeutralSpecifically for money amounts going up — budgets, salaries and the like.
• Synonym加かWrittenA Sino-Japanese morpheme; standalone it mostly means addition or Canada, and it relates to 「増加」 only in the 「加」 morpheme sense — rarely used by itself today.
• Synonym増やしふやしNeutralNoun form of 「増やす」; seldom stands alone, mostly appearing inside compounds.
• Synonym増ぞうWrittenSino-Japanese suffix or shorthand, as in 「前年比3割増」; seen mostly in news reports and statistics.
• Synonym増分ぞうぶんWrittenMathematical and technical term for the amount a variable increases — an increment.
• Synonym増さるまさるWrittenArchaic verb for growing or deepening, rarely seen today; say 「増す」 instead.
• Related高まるたかまるNeutralFor degrees or moods rising, as in 「関心が高まる」; not used for countable quantities.
• Related膨らむふくらむNeutralTo bulge or swell, figuratively budgets or dreams ballooning; stresses volume or scale growing.
• Related膨れるふくれるNeutralTo bulge or swell, or to puff up in a sulk; its quantity sense is rare.
• Related増進ぞうしんWrittenWritten word for building up strength or appetite, as in 「食欲増進」「健康増進」.
• Related拡大かくだいNeutralFor scope or scale expanding, also enlarging images; 「増加」 stays with quantity.
• Related引き上げひきあげNeutralA deliberate upward revision of prices, taxes or rates, as in 「消費税の引き上げ」.
• Related拡張かくちょうNeutralFor extending range or functions, as in 「道路拡張」「拡張機能」.
• Related膨張ぼうちょうNeutralFor physical volume expanding, figuratively budgets or cities overgrowing.
• Antonym減少げんしょうNeutralThe antonym: quantity going down, as in 「人口減少」.

For quantity growing, 「増加」 is the written choice while 「増える」 and 「増やす」 are the everyday verbs. Use 「増大」 or 「拡大」 for scale or scope, 「上昇」 for figures and levels climbing, 「増額」 for money. 「増殖」 is for cells and organisms multiplying, 「増量」 volume, 「増強」 staff and equipment, 「増進」 health and appetite, 「増分」 increments, 「引き上げ」 rate hikes; 「アップ」 is colloquial, 「増」 a statistical suffix. Swelling: 「膨らむ」「膨張」「膨れる」; growth momentum: 「伸び」「伸長」; moods rising: 「高まる」「高まり」; range or functions: 「拡張」. 「減少」 is the antonym.

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

1. 数量すうりょうが増ふえること。多おおくなること。
2. 数量すうりょうを増ふやすこと。多おおくすること。