Base

基地

jīdì

(permanent structure for housing military)

基礎 /基础

jīchǔ

(something from which other things extend)

基礎 /基础

jīchǔ

(starting point of thought)

壘 /垒

lěi

(safe zone in children's game)

壘 /垒

lěi

(baseball: one of the three places that a runner can stand in safety)

總部 /总部

zǒngbù

(headquarters)

鹼性 /碱性

jiǎnxìng

(chemical compound that will neutralize an acid)