Words are taken from Spelling Bee competitions. All words are listed with simple definitions and alphabetically divided into 3 levels
Beginner Level. Words List 1 | List 2 | List 3 | List 4
Intermediate Level. Words List 5 | List 6 | List 7 | List 8
Advanced Level Words List 9 | List 10 | List 11 | List 12
Source: sharonherald.com
List of English Idioms and their meaning
Source: esldesk.com
Common spelling mistakes and confusing words in English language
Accept vs Except | Then vs Than
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