Suddenlying is a common word that is often used in daily conversations, especially when we are discussing unexpected or abrupt events or situations. Some of the synonyms of suddenlying include instantly, immediately, unexpectedly, hastily, quickly, swiftly, promptly, and suddenly. These words can be used interchangeably with suddenlying and can add variety and interest to your writing or speech. It's essential to choose the appropriate word according to the context in which it is being used to convey the right meaning effectively. Using synonyms can help you avoid repetition and make your expression precise and concise.