Commonly Misspelled Words and Frequent Errors In case you missed it on my Twitter feed: Cannot According to www.dictionary.com , the words can and not are generally written as one word, cannot. However, there are occasions when the words may be spelled as separate words. I can think of at least one, where you wish to include an adverb between the two parts: My boss can absolutely not justify any salary hikes this year. Another There is a very different case with another , a combination of an and other since the 13 th century ! In other words, even Shakespeare 1 was using another as only one word. So how about if you do too? If you travel to the United States or other English-speaking countries, you might hear a very common mistake with another : a rather curious separation of the word into a and nother*. Even though the term may be found on www.dictionary.com (first usage dated 1955-56), it is still inappropriate to use: