alarm 强调突然意识到有危险而产生的恐惧心理。
fear 普通用词，侧重指面临危险或灾祸时内心所引起的恐惧心情。
fright 通常指一阵突然的、令人震惊的短暂恐惧，有时含夸张意味。
horror 侧重指因看到令人讨厌或危险的东西或情景而引起的厌恶情绪、极度恐惧心情或战栗的动作。
panic 常指因突如其来的外界威胁使人群出现惊慌、恐惧或混乱。
terror 指极大的恐惧和惊骇，语气最强。
dread 可与fear换用，着重害怕的心理，但dread常指胆怯和丧失勇气。
参考例句
1. The noise of thunder alarmed one all night. 隆隆雷声使人整夜不得安宁。
2. The news of the radiation leak caused widespread public alarm. 辐射泄露的消息引起了公众的普遍恐慌。
3. You should find a way to remind yourself. How about setting an alarm clock? 你因该要找到一个方法提醒你。设置一个提醒闹钟怎麽样?
英英解释
n.
1. fear resulting from the awareness of danger
2. a device that signals the occurrence of some undesirable event
3. an automatic signal (usually a sound) warning of danger
4. a clock that wakes sleeper at preset time v.
1. fill with apprehension or alarm; cause to be unpleasantly surprised
2. warn or arouse to a sense of danger or call to a state of preparedness
