In the Chinese language, there are some words composed of two characters and the order of the two characters can be reversed without changing the meaning of the word.
These kinds of words are composed of two characters with the same or similar meaning. Here are some common examples.
AB=BA
讲演 ↔ 演讲 lecture, speech, give a lecture
别离 ↔ 离别 to part or leave (for a long time)
虚空 ↔ 空虚 hollow; empty; void; vain; blank; vacant
和平 ↔ 平和 gentle; mild; peaceful
语言 ↔ 言语 speech
问询 ↔ 询问 enquire
互相 ↔ 相互 mutually
样式 ↔ 式样 model
整齐 ↔ 齐整 neat; uniform; tidy
并吞 ↔ 吞并 to annex; to swallow up; to absorb
质朴 ↔ 朴质 simple and unadorned; natural
喜欢 ↔ 欢喜 joyful; happy; delighted; gleeful
情感 ↔ 感情 emotions; feelings; affections
山河 ↔ 河山 rivers and mountains; land 2.territory
登攀 ↔ 攀登 climb
彩色 color ↔ 色彩 color
觉察 ↔ 察觉 to detect; to become aware of; to perceive; to discover; to awake to
依偎 ↔ 偎依 to nestle to; to lean close to
累积 ↔ 积累 to accumulate
代替 ↔ 替代 to substitute for; to cover for; to take the place of; to replace; to fill in
妒忌 ↔ 忌妒 envy; jealousy; to be envious of; to be jealous
缓和 ↔ 和缓 relax; to ease up
胆大 ↔ 大胆 bold
久远 ↔ 远久 remote
容颜 ↔ 颜容 countenance
奋发 ↔ 发奋 exert oneself
Pay attention:
Some words have more than one meaning, in this case, not all the meanings but one or some of them stay the same, for example, 喜欢 can mean “like or happy ” but 欢喜 can only mean “happy”.