suddenly同abruptly係咪同義字?

Both words have similar meaning but not identical. In most cases, you can choose either one, but sometimes you may have to choose the more appropriate one out of two depending on the situation.

suddenly (adv) - happening or done quickly and unexpectedly
abruptly (adv) - suddenly and unexpectedly, often in an unpleasant way

e.g.
Suddenly Mary gave John a kiss on his cheek.
Peter left the room abruptly after being mocked by his colleagues.

suddenly
釋義
ad.
1. 意外地;忽然;冷不防
I suddenly remembered that I hadn't locked the door.
我突然記起我沒有鎖門。

abruptly
釋義
ad.
1. 突然地;意外地
The temperature dropped abruptly.
氣溫驟降。
2. 唐突地,魯莽地
3. 陡峭地;險峻地
4. 不連貫地;支離破碎地

suddenly同abruptly係同義字