What context can I use each word in?
Learn when and how to use these words with these examples!
crucial
Example
It is crucial that we finish this project on time. [crucial: adjective]
Example
The next few weeks will be crucial for the success of our business. [crucial: adjective]
key
Example
Communication is key to building a strong relationship. [key: adjective]
Example
The key to solving this problem is to identify the root cause. [key: noun]
Good things to know
Which word is more common?
Key is more commonly used than crucial in everyday language. Key is versatile and covers a wide range of contexts, while crucial is less common and tends to be used in more serious or urgent situations.
What’s the difference in the tone of formality between crucial and key?
Both crucial and key can be used in formal and informal contexts. However, crucial may be perceived as more formal due to its serious and urgent connotation.
