A small inventory of a big world
Pull up the first words almost any toddler says and you will notice a pattern before you notice anything else. Mama. Dada. Dog. Ball. Shoe. Milk. Car. Nose. The list reads like a tour of the kitchen and the front hall. What you will not find, at least not at first, is much in the way of action. Words like give, bring, open, fall, and run tend to arrive later, after the nouns have already crowded in.
This is not a coincidence of your particular child. Across decades of vocabulary research, in study after study, early word lists tilt heavily toward names for things. The tilt is so reliable that researchers gave it a name: the noun bias, sometimes called the noun advantage. Understanding why it happens turns out to be one of the most useful things a parent can know, because it quietly changes what you say and when you say it.
Why a thing is easier to name than an action
The leading explanation comes from the cognitive scientist Dedre Gentner, who proposed what she called the natural partitions hypothesis. The idea is disarmingly simple. The world does not hand a child meanings already cut into word-sized pieces. The child has to do the cutting. And some pieces are far easier to cut out than others.
A dog is a natural partition. It has edges. It holds still, more or less. You can point at it, walk around it, and it is the same dog from every angle. When you say dog while a dog is present, a toddler can lean on what psychologists call the whole object assumption—the working bet that a new word probably names the whole thing in front of them, not its ear, its color, or the grass underneath it. Nouns for concrete objects are highly imageable: the word summons a clear mental picture. That makes them sticky.
Verbs ask for something much harder. Give is not a thing you can point to. It is a relationship that unfolds over time, between a person, an object, and another person, and then it is gone. To learn give, a child has to notice the moving parts, decide which slice of the event the word is labeling, and ignore everything happening at the edges. The action is over before the word can be matched to it. Verbs, in other words, are relational—and relations have to be built in the mind rather than spotted in the room.
Verbs ride on the nouns you already have
There is a second reason the order is no accident: verbs need nouns to stand on.
Think about what it takes to understand the dog is chasing the ball. You cannot grasp chasing until you already have dog and ball as stable anchors. The verb describes how those two things relate, so the nouns are the scaffolding the verb climbs. This is why verb learning tends to accelerate once a child has a solid base of object words and starts combining them. The first words build the parts; the later words describe what the parts do to each other.
Researchers have shown this dependency directly. Toddlers learn a new verb far more readily when the nouns in the sentence are familiar, because the known words free up attention for the unfamiliar one. Hand a child a sentence full of new labels and a new action all at once, and the verb usually slips through. Anchor it in words they already own, and it has somewhere to land.
It is not the same in every language
Here is the detail that keeps the noun bias honest, and keeps it interesting. It is strong, but it is not universal in its strength.
In English, the way we talk to small children leans hard on naming. We hold up an object and ask, What's that? We narrate the nursery as a gallery of nouns. But in some languages—Mandarin and Korean among the most studied—verbs are more grammatically prominent and are often allowed to sit at the very end of a sentence, the position that tends to catch a young listener's ear. Caregivers in those language communities also use proportionally more action talk. And children learning them show a weaker noun bias, picking up verbs comparatively earlier.
The lesson is not that one language is better. It is that the noun bias is partly cognitive—objects really are easier to carve out—and partly a reflection of what children hear. The input shapes the order. Which means a parent has more leverage than they might think.
How verbs actually get learned: many messy moments
Because an action vanishes the instant it happens, children rarely learn a verb from a single clean example. They learn it the way they learn most things: by cross-situational learning, gathering many imperfect glimpses and letting the meaning settle out of the overlap.
The first time a toddler hears pour, they might think it means cup, or water, or spilling, or kitchen. The second time—pouring juice, pouring sand, pouring at a friend's house—the irrelevant guesses fall away and the common thread, the tipping-and-flowing, survives. Verbs are learned statistically, across repetitions, in varied settings. This is exactly why a single demonstration so often fails and why the same word, met again and again in slightly different moments, eventually clicks.
What this means at home
None of this requires drilling, and none of it means nouns are a problem to be corrected. The noun-heavy start is healthy and necessary; it is the foundation. The useful move is to gently widen the diet once that foundation is in place.
Narrate the action, not just the object. Instead of stopping at ball, add the verb in motion: You're rolling the ball. It stopped. Roll it again. Say the action word while the action is happening, so the label and the event arrive together.
Front-load the verb sometimes. English buries verbs in the middle of sentences. Now and then, let one stand out: Splash! You splashed. A verb that lands at the edge of a phrase, with a beat around it, is easier to catch.
Repeat the same verb across different scenes. Open the box, open the door, open your hands. The variety is the teacher. It strips away the accidental meanings and leaves the real one.
Build verbs on known nouns. When you introduce an action word, pair it with objects your child already names confidently. The familiar noun carries the new verb.
The quieter truth underneath
The noun bias is, in the end, a story about how a mind makes order out of a blur. A toddler starts with the things that hold still long enough to be named, then slowly learns to describe the spaces between them—the giving, the falling, the chasing. First the nouns, then the world set in motion. You are not behind if the verbs are slow. You are watching the order unfold exactly as it should.
This is the thinking behind Acorn, our three-minute daily first-words app for one- to three-year-olds. Acorn starts where toddlers start—with clear, nameable things a child can map in a single glance—and then weaves in the simple action words that ride on top of them, spaced and repeated across short sessions the way real learning actually happens. No ads, no upsells, no noise; just a calm few minutes that respect how a small mind builds language. If you would like a gentle, science-grounded way to grow those first words, you can meet Acorn at https://acorn.lumenlabs.works.