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Tomorrow or Tommorrow? Why This Common Spelling Mistake Happens - jordan4532 - 07-27-2026 Some words seem so simple that you never expect to spell them incorrectly. Tomorrow is one of those words. It's a word we use almost every day in emails, text messages, school assignments, and conversations. Yet many people still pause before typing it because they aren't sure whether it's tomorrow or tommorrow. If you've ever added an extra m, you're not alone. It's one of the most common English spelling mistakes. The good news is that once you understand why the error happens, remembering the correct spelling becomes much easier. The Correct Spelling Let's clear up the confusion right away. The correct spelling is tomorrow. It has: One m Two rs The spelling tommorrow is always incorrect. The same goes for other common mistakes such as tomorow, tommorow, and tomarrow. None of these spellings are accepted in standard English. Because tomorrow is used so frequently, spelling it correctly is important. A small typo in such a common word can stand out more than a mistake in a difficult or unusual word. How "Tomorrow" Works in a Sentence The word tomorrow can serve two different grammatical purposes. As a noun: Tomorrow will be a busy day. We are looking forward to tomorrow. As an adverb: I'll call you tomorrow. The meeting starts tomorrow morning. Even though its function changes, the spelling never does. It is always written as tomorrow. Why Do People Write "Tommorrow"? The biggest reason is pronunciation. When we say the word aloud, the middle sound often feels stronger than it actually is. Many English words contain double letters after stressed syllables, so our brains naturally expect the same pattern here. As a result, many people instinctively type an extra m, creating tommorrow instead of tomorrow. Fast typing also plays a role. When you're writing quickly, it's easy to press the m key twice without noticing until later. The History Behind the Word The spelling makes much more sense when you know where the word comes from. Tomorrow developed from two older English words: to morrow The word morrow once meant the next day or the following morning. Although it is rarely used today, it still survives inside the word tomorrow. This explains the spelling perfectly. The first part contributes the single m, while morrow already contains the double r. Knowing this historical structure helps explain why the word has one m but two rs. Easy Ways to Remember the Correct Spelling You don't have to memorize the entire word as one long string of letters. A few simple tricks can make it much easier. Break It Into Two Parts Think of the word as: to + morrow Seeing the two parts separately makes it easier to remember where each letter belongs. Think of Similar Words Words like borrow and sorrow share the same -orrow ending. If you already know how to spell those words, you can use the same pattern for tomorrow. Focus on the Letter Pattern Remember this simple formula: One m Two rs Repeating this pattern a few times helps it become automatic. Practice in Complete Sentences Writing the word in real sentences builds muscle memory much faster than simply looking at it. For example: I'll finish the project tomorrow. We're leaving tomorrow afternoon. Tomorrow is another opportunity to start fresh. Why Correct Spelling Matters Some people think an extra letter doesn't matter very much, but common spelling mistakes can affect how your writing is perceived. In professional emails, reports, resumes, or business messages, frequent spelling errors may give the impression that the writer rushed through the work. Students can also lose marks when common words are repeatedly misspelled, especially in exams and assignments. For online writers and bloggers, consistent spelling helps readers trust the content and makes articles look more polished and professional. Fortunately, this is an easy mistake to fix once you know the correct pattern. Don't Depend Only on Spell Check Modern writing tools are helpful, but they are not perfect. Applications like Microsoft Word, Google Docs, and Grammarly usually detect tommorrow immediately. However, some messaging apps, mobile keyboards, and online forms may not catch every typo. That's why it's still worth proofreading your writing, especially when using words you know you sometimes misspell. Developing good spelling habits will always be more reliable than depending entirely on autocorrect. Final Thoughts The answer is simple: tomorrow is the only correct spelling. Tommorrow is always a mistake. Remember that the word comes from to and morrow, giving it one m and two rs. Once you understand its history and practice the correct letter pattern, you'll be far less likely to make the same mistake again. The next time you hesitate before typing the word, remember this simple rule: one m, two r's, and you'll spell tomorrow correctly every time.