Word pairings that share a similar sound or spelling. The meanings of the words in these pairings can be very different, or close. As the sounds, spellings, or meanings of the words in such pairings are the same or similar, writers often choose the wrong one, causing a writing error.

"A textbook for upper intermediate to advanced level English language learners (B2/C1) that offers perspectives on world issues alongside opportunities to develop English as an international language." NOTE: British English
This is a Free, Online Open Educational Resource

A phrasal verb is an idiomatic phrase consisting of a verb and another element, typically either an adverb, a preposition, or a combination of both.

Listing of common American slang. Many additional ESL resources on the rest of the site.

Learning English slang and idioms, then using them correctly in context can be very challenging. This site was specifically designed to help low-intermediate to advanced learners improve their communication survival skills in many different situations. EZSlang will try to make learning slang an easier process for better communication.

This site offers over 280 Common American Slang Expressions Sorted Alphabetically. Also allows you to change Idioms to plain English.