How to say "full-scale" in Japanese

• 全面的ぜんめんてきCommon
  na-adjectiveCovers the 'all-out, total' sense of full-scale: complete in extent across the board. Typical of efforts such as all-out cooperation, mobilization, or a sweeping revision of policy.
  彼かれらは全面的ぜんめんてきに私を支持しじしてくれた。↗

  They backed me up in everything.
• 本格的ほんかくてきCommon
  na-adjectiveCovers the 'full-blown, full-fledged' sense: something that has become serious or properly developed rather than partial or tentative, as in a full-scale war, investigation, or business launch.
  本格的ほんかくてきな休暇きゅうかは３年ねんぶりだ。↗

  It's three years since I had a real vacation.

Use 全面的 for a total, all-out effort or sweeping scale of action, and 本格的 for something that has grown into a serious, full-blown or full-fledged undertaking.

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

• 全面的ぜんめんてきtotal
• 本格的ほんかくてきfull-scale