本塁|ほんるいhonrui[1]atamadaka (head-high)

1. nounbase; stronghold; main fort
2. noun, baseballhome base; home plate

• SynonymホームプレートNeutralA loanword for the pentagonal plate at home base in baseball; 「本塁」 can also mean the base as a position or a stronghold.
• SynonymホームベースNeutralThe usual spoken term in baseball for home base and the plate; 「本塁」 appears mainly in rules and reports, as in 「本塁打」.
• Related砦とりでWrittenA fortress or stronghold built for defense, also figuratively a last line of defense; 「本塁」 originally means the main fort or base.
• Related城郭じょうかくWrittenA castle and its outer walls, focusing on the whole castle's architecture; 「本塁」 means the main fort.
• Related基地きちNeutralA military base or base for activities, as in 「空軍基地」; common in modern usage.
• Related拠点きょてんNeutralA key base for activities, as in 「海外拠点」; the most versatile of these words, common in modern business.
• Related本拠ほんきょWrittenWritten style for one's main base or headquarters, as in 「本拠を構える」; also a team's home ground.
• Related根拠地こんきょちWrittenA base of operations for an army or organization; somewhat old-fashioned and written.
• Related要塞ようさいWrittenA large military fortress at a strategic spot such as a border or coast; strongly military in flavor.
• Related根城ねじろNeutralA main base or lair, often for bandits or gangs; a rather casual tone.
• Related城塞じょうさいWrittenA castle and fortress combined, i.e. a citadel; often seen in history and games, while 「本塁」 stresses the main fort.
• Related堅塁けんるいWrittenA heavily fortified stronghold, also figuratively a defense line that is hard to break.
• Related本拠地ほんきょちNeutralThe headquarters or home ground of an organization or team; more colloquial than 「本拠」.
• Related堡塁ほうるいWrittenA defensive position built of earth, stone or concrete; a military term.
• Related要害ようがいWrittenWritten style for a strategic stronghold or key position; stresses the advantage of the terrain.
• Antonym敵陣てきじんNeutralThe enemy camp or lines, opposed to 「本塁」; in shogi, the opponent's last three rows.
• Antonym敵塁てきるいWrittenThe enemy's fortress, the opposite of one's own 「本塁」.

In baseball, formal usage says 「本塁」, as in 「本塁打」, while 「ホームベース」 is the everyday spoken word. For an organization's base of operations, use 「拠点」 or 「本拠地」; for military fortresses, 「要塞」 or 「砦」.

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

1. 本拠ほんきょとなる砦とりで、場所ばしょ。
2. 野球やきゅう、ソフトボールにおけるホームベース。