The world’s first dictionary by sound also includes thousands of English expressions cataloged by their main words. English spelling doesn’t make sense. GRASS IS BLACK organizes the 2,000 most common words in English by main vowel sound. Learners can finally look up spelling from the words they hear!
(The founding concept, the Thompson Vowel Chart is a free download and how to use main vowel sounds by color is laid out in English is Stupid, Students are Not.)