strongpoints

/ˈstrɒŋˌpɔɪnt/

a location that is by its site and nature easily defended ^要塞

There are nightly attacks on the strongpoints;
每夜都有针对战略要点的袭击；

单词造句:

反义词shortcoming/ˈʃɔːtkʌmɪŋ/n. 缺点；短处

近义词virtue/ˈvɜːtʃuː/n. 美德；优点；贞操；功效