基地|きちkichi[1]atamadaka (head-high)

1. nounbase (military, expedition, etc.)
   この近ちかくに軍ぐんの基地きちがある。↗

   There is a military base near here.
2. noun (suffix)enthusiast; maniac; fanatic; nut; freakfrom キチガイ

• Synonym拠点きょてんNeutralA general word for a key base of any activity, as in 「販売拠点」 or 「研究拠点」; it stresses a foothold for operations and is not limited to military installations.
• Synonym根拠地こんきょちWrittenWritten-language term for the main base where an army or organization operates, e.g. an operational base; fairly rare, and everyday speech prefers 「拠点」 or 「本拠地」.
• RelatedベースNeutralLoanword for a base or stronghold, as in 「ベースキャンプ」, and also for a foundation or a baseball base; with so many senses, formal contexts prefer 「基地」.
• Related本拠ほんきょWrittenFormal, written word for one's main base of activity, as in 「本拠を置く」; it stresses where a headquarters sits, while 「基地」 usually means military or expedition facilities.
• Related本塁ほんるいNeutralMostly the baseball term for home plate; its sense of a main stronghold is rare. To speak of a base, 「基地」 or 「本拠」 is the usual choice.
• Related根城ねじろNeutralOriginally the castle where a commander lived; now a base or lair, as in 「盗賊の根城」, often with a negative shade. 「基地」 itself is neutral, with no such colouring.
• RelatedホームNeutralLoanword for home, one's home ground or home plate, as in 「ホームゲーム」; it belongs to sports and everyday life and is not used for military bases.
• Related本拠地ほんきょちNeutralThe main place where an organization or sports team is based, as in 「本拠地球場」; it stresses the headquarters or home ground, while 「基地」 stresses the facility.

Use 「基地」 for military or expedition bases, as in 「米軍基地」; for bases of all sorts of activity pick 「拠点」, for a team's or group's home base 「本拠地」, and for a villain's lair 「根城」.

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

1. （きち）活動かつどうの拠点きょてんとなる場所ばしょ。特とくに、軍隊ぐんたいや探検たんけん隊たいのもの。
2. （きち）気違きちがい。