Why Kids Confuse Look-Alike Words Like Was and Saw

The Mix-Up That Isn't a b/d Problem

Some early readers swap was for saw, or read want as if it were went. It looks similar to a b/d reversal, but it's a different kind of mistake: no letters are mirror images here. Instead, the words share most of the same letters, just rearranged or with one swapped out, and the reader's eye grabs the wrong match.

This is worth telling apart from letter reversals because the fix is different. A b/d mix-up is about which way a single letter faces. A was/saw mix-up is about a reader not fully checking a whole word before guessing at it.

Why This Happens

Skilled reading depends on a process researchers call orthographic mapping: building a detailed enough mental record of a word's exact letters, in exact order, that the word can be recognized instantly and accurately from then on (Kilpatrick, 2016). When that mapping is incomplete, a reader ends up storing something closer to "a short word with a w, an a, and an s in it somewhere" than the precise sequence w-a-s. Faced with another word built from the same handful of letters, the reader's best guess comes from that fuzzy, partial memory - and saw fits just as well as was does.

This kind of error is closely related to what shows up in other reading-error research as a transposition - reading or writing a word with its letters in the wrong order, the same category of mistake as reading girl as "grill" (M.A. Rooney Foundation, 2019). The letters are all there; the order got scrambled somewhere between the eye and the mouth.

There's a specific reason this tends to happen with short, extremely common words like was, saw, want, and what: because these words appear on almost every page, children start recognizing them "on sight" very early - often before their letter-by-letter attention is fully reliable. Ironically, that familiarity can work against careful reading. A word seen a thousand times invites a quick glance instead of a careful check, and a quick glance is exactly when a scrambled or swapped guess sneaks in.

Why "Just Memorize It" Doesn't Fix This

It's tempting to treat this as a vocabulary problem - drill the word was until it sticks. But if the underlying issue is that a child isn't reliably scanning every letter in order, drilling one word in isolation won't transfer to the next look-alike word that comes along. The actual skill to build is the habit of checking a whole word, left to right, every time - even for words that feel "easy."

How This Differs From "Just Not Knowing the Word"

It's worth noticing that these mix-ups usually happen on words a child has technically "known" for a while - that's part of what makes them confusing for parents. A child who can't read want at all isn't making a was/saw-type error; they're simply still learning the word. The mix-up pattern this post is about specifically shows up in words a child has read correctly many times before, which is exactly why it points to a mapping problem rather than a knowledge gap: the word was never fully, precisely stored in the first place, so it's available to be confused with its near-twins.

How to Fix It: Build the Look-Alike Habit

The most effective practice deliberately puts confusable words side by side and asks a child to tell them apart by careful reading, not by guessing from shape or a fast first glance (Kilpatrick, 2016). You can build your own quick version of this at home with any pair of short, similar-looking words your child tends to swap - for example, on and no, or form and from. Write both on separate cards, say one aloud, and ask your child to point to the one you said. Because the words look almost identical, your child has to actually process every letter to get it right - guessing from the general shape won't work anymore.

How to Practice at Home

• Build your own look-alike pairs. Use whichever specific words your child actually mixes up, rather than a generic list - the confusion is often personal to the words they read most.
• Slow down on function words, not just "hard" words. Remind your child that short, common words deserve the same letter-by-letter care as long unfamiliar ones - they're just as easy to misread quickly.
• Ask "which letter is first?" When a mix-up happens, have your child point to and name the very first letter of the actual word before rereading it. This interrupts the guess-from-shape habit.
• Praise the check, not just the correct answer. If your child catches themselves and rereads carefully, that self-correction is the real skill you're building - point it out.
• Don't overcorrect in the moment. A gentle "look again" is usually enough; turning every mix-up into a long explanation can make a child more anxious about these words, not less.

When It's More Than an Occasional Slip

Every young reader mixes up a look-alike word here and there - it's a normal part of building precise word memories, not a warning sign by itself. What's worth a closer look is a pattern that doesn't ease up with practice: frequent mix-ups across many different word pairs, alongside slow or effortful reading more generally. If that's what you're seeing, a proper reading evaluation from a qualified professional - not a checklist of symptoms - is the right next step; screeners and symptom lists can flag a concern, but they can't diagnose one on their own.

This same idea - that skipping ahead on "easy" words causes more errors than it prevents - is a big part of why guessing from shape or a first letter becomes such a hard habit to unwind once it sets in, and why building a large bank of instantly, precisely recognized words matters so much; see what orthographic mapping actually is for more on how that memory gets built in the first place.

Sweet Phonics uses this same forced-choice mechanism for the confusions it's specifically built to target: certain lessons present two similar-looking words and have the child listen and tap the one that was actually said. Its built-in pairs are aimed at sound confusions rather than was/saw-style letter-order mix-ups specifically, but the underlying technique - listen carefully, then choose between two close look-alikes - is exactly what you can build at home for whichever pair your own child confuses.

The Takeaway

Was/saw-type mix-ups happen when a reader has a fuzzy, partial memory of a word's letters instead of a precise one - and short, extremely familiar words are especially prone to it, because familiarity invites a quick glance instead of a careful read. The fix isn't more repetition of the same word; it's practice that forces full attention to every letter, in order, especially on the short words that feel "already known." If reversals like this show up alongside letter-shape confusions too, our post on b and d mix-ups covers that related but distinct pattern.