Word square place names). However, 11-squares are possible if words from a number of languages are allowed ("Word Ways", August 2004 and May 2005). It is possible to estimate the degree of difficulty of constructing word squares. 5-squares can be constructed with as little as a 250-word vocabulary. Roughly, for each step upwards, one needs four times the number of words. For a 9-square, one needs over 60,000 9-letter words, which is practically all of those in single very large dictionaries. For large squares, the vocabulary prevents selecting more "desirable" words (i.e. words that are unhyphenated, in common use, without contrived inflections,
Commonly misspelled English words thousands of variations from combining prefixes or suffixes (or both) added to the root words. To limit the scope to common words, the top 350 words are considered (according to various sources). The following list, of about 350 words, is based on documented lists of the top 100, 200, or 400 most commonly misspelled words in all variants of the English language, rather than listing every conceivable misspelled word. Each word is followed by examples of misspellings: Mispronunciation is known to be one of the most common causes of misspelling. Hence, phonetic misspelling is common, once a word is mispronounced.