Cool MateAssure vs Guarantee
When to use each in English, with meaning, register, and examples.
Assure
Top 1,000 (very common)B2verb
Guarantee
Top 2,000 (common)B2verb
Most common: Assure
| Assure | Guarantee | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/əˈʃʊə(r)//əˈʃɔː(r)/","/əˈʃʊəz//əˈʃɔːz/","/əˈʃʊəd//əˈʃɔːd/","/əˈʃʊərɪŋ//əˈʃɔːrɪŋ/"]/🇺🇸 /["/əˈʃʊr/","/əˈʃʊrz/","/əˈʃʊrd/","/əˈʃʊrɪŋ/"]/ | 🇬🇧 /["/ˌɡærənˈtiː/","/ˌɡærənˈtiːz/","/ˌɡærənˈtiːd/","/ˌɡærənˈtiːɪŋ/"]/🇺🇸 /["/ˌɡærənˈtiː/","/ˌɡærənˈtiːz/","/ˌɡærənˈtiːd/","/ˌɡærənˈtiːɪŋ/"]/ |
| Meaning | To make someone feel sure about something | A promise that something will happen or be done. |
| Example | I assure you that everything will be fine. | I can guarantee that you will enjoy this movie. |
| Register | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 2,000 (common) |
| CEFR level | B2 | B2 |
| Part of speech | verb | verb |
| Collocations | can, hasten to, of, let me assure you | absolutely, personally, constitutionally, be able to, can, be fully guaranteed, absolutely, almost, practically |
| Antonyms | doubt, disprove, deny | doubt, uncertainty, dispute |
| Common mistakes | Confused with 'ensure' which means to make certain something happens., Using it without a direct object; 'I assure that...' is incorrect., Mixing up 'assure' with 'insure' which relates to insurance. | Confused with 'ensure' — 'guarantee' implies a stronger promise., Incorrectly using 'guarantee' without a direct object — always specify what is guaranteed., Mixing up 'guaranteed' as an adjective instead of a past participle. |
| Usage notes | Use 'assure' when you want to promise someone that something is true or will happen. It’s often used in more formal situations. Avoid using it in casual conversations where simpler verbs like 'tell' or 'say' might fit better. | Use 'guarantee' when you want to express certainty about an outcome. It's suitable for both written and spoken English, but avoid in casual conversations where simpler words like 'promise' may suffice. |
Frequently asked questions: Assure vs Guarantee
What's the difference between Assure and Guarantee?
Assure: To make someone feel sure about something Guarantee: A promise that something will happen or be done.
Which is more common: Assure and Guarantee?
Assure is the most common in everyday English.
Are Assure and Guarantee the same CEFR level?
Assure: B2, Guarantee: B2 on the CEFR scale.
Can I use Assure and Guarantee interchangeably?
Not always. Assure and Guarantee are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.