90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.
Differences between British and American English: gas
In the UK, gas usually refers to a clear substance like air that is burned to cook food or to heat your house: a gas boiler. Gas can also have this meaning in the US, but when American speakers say gas they are usually referring to a type of liquid fuel that is used to produce power in cars: ♦ We’d better get gas on our way out of town. In the UK, you call this fuel petrol.