How to say "ample" in Japanese

• 潤沢じゅんたくCommon
  na-adjective, nounCovers 'ample' chiefly when the subject is money, funds, or resources, suggesting a supply more than sufficient; it is essentially the financial one, narrower than the other two here.
  国庫こっこは資金しきんが潤沢じゅんたくである。↗

  The government coffers are replete with funds.
• 豊かゆたかJLPT N3approx.Common
  na-adjective, suffixThe broadest of the three: 'ample' in the sense of rich and full, whether of harvests, nature, experience, or life; choose it when 'ample' shades into 'rich' rather than meaning sheer quantity.
  オーストラリアは天然てんねん資源しげんが豊ゆたかである。↗

  Australia is rich in natural resources.
• 豊富ほうふJLPT N3approx.Common
  na-adjective, nounDescribes 'ample' as plentiful in amount or supply — ample quantities, ample stock, ample knowledge or experience; the straightforward choice when the point is simply that there is a great deal of something.
  その国くには石油せきゆが豊富ほうふである。↗

  Oil is abundant in that country.

Use 豊富 when 'ample' means plentiful in quantity or supply, 「豊か」 for the broader 'rich and full' sense, and 潤沢 chiefly for ample money, funds, or resources.

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

• 潤沢じゅんたくabundant
• 豊かゆたかabundant
• 豊富ほうふabundant
• ふんだんplentiful