How Many Words Can a Dog Learn? What the Research Says
Updated: 4 days ago
Ask your dog if they want to go for a walk and you'll probably see their ears go up before you've finished the sentence. Dogs clearly understand some of what we say, but how many words can a dog learn, and how much of it is really the word rather than our tone or body language? The research is fascinating, and it's useful too, because it shows how to teach words your dog will actually understand.
THE SHORT ANSWER
Most dogs understand somewhere between about 80 and 200 words and phrases, and psychologist Stanley Coren estimated the average at around 165. A few exceptional dogs learn far more. Chaser, a Border Collie in the United States, learned the names of over 1,000 toys. Dogs understand words best when each word is used the same way every time and linked to something they care about, like food, play or a walk. Tone and body language help, but brain scans show dogs do process the words themselves.
How many words can a dog learn?
The figure you'll often see is 165 words. It comes from Stanley Coren, a psychologist who estimated that an average dog understands about 165 words, signals and gestures, with the cleverest dogs reaching around 250.
Most of those are things that matter in a dog's day, like their name, "walk", "dinner", "sit", "leave it", family members' names and favourite toys. Many dogs also learn words we never meant to teach, like "car keys" or "vet".
How many words do dogs understand?
Understanding a word means linking a sound to a thing or an action. Dogs are very good at this when the link is clear and repeated.
In 2016, researchers in Hungary scanned the brains of dogs while their trainers spoke to them. The dogs' brains processed the meaning of words separately from the tone of voice, and they responded most when a praise word was said in a praising tone. So tone helps, but the word itself matters to them too.
More recent research has found that when some dogs hear the name of a familiar toy, their brain responds as if they're expecting to see that toy. That suggests dogs can hold a picture of the object in their mind, not just a habit of fetching.
The dogs who learn hundreds of words
A small number of dogs are word-learning superstars. Chaser, trained by retired psychology professor John Pilley, learned the names of 1,022 toys and could pick out a new toy by working out that an unfamiliar word must belong to the one toy she didn't know.
Researchers in Budapest now study these "gifted word learners" from all over the world. Many are Border Collies, but not all. What surprised the researchers is how rare they are. Most dogs, even with lots of practice, find it hard to learn the names of more than a couple of toys. Learning action words like "sit" and "down" is much easier for most dogs than learning the names of objects.
So if your dog doesn't know the name of every toy, that's completely normal. It doesn't mean they're any less clever.
How dogs learn words
Dogs learn words through association. A word that reliably comes just before something good soon starts to mean that thing. That's why "walk" is often one of the first words a dog learns without being taught.
Some dogs pick up words faster than others. That's fine. A few simple habits make word learning easier for any dog:
Consistency: use the same word for the same thing every time, and make sure the whole family does too
Timing: say the word just before the action or object appears, not during or after
Meaning: pair words with things your dog loves, like food, play and outings
Short and clear: one or two syllables, and words that don't sound like each other
If "down" means lie down to one person and get off the sofa to another, your dog has no way to work out what you want.
How to teach your dog new words
Name their toys
Pick one toy and say its name as you play with it, many times over a few days. Then put it on the floor next to a toy your dog doesn't care about and ask for it by name. Reward with a big game when they pick the right one.
Label everyday routines
Choose a word for each part of the day, like "breakfast", "garden", "car" or "bed", and use it just before each one happens. Your dog will soon start to anticipate what's coming, which helps many dogs feel more settled.
Teach a release word
Words like "free" or "OK" that tell your dog they've finished a stay or a wait are some of the most useful words they'll ever learn. Read why the release cue matters.
Keep it fun
Word games are a brilliant way to tire out your dog's brain on a wet day. Short sessions of a few minutes, ending while your dog is still keen, work better than long ones.
RENEE'S TIP
Make a list of every word your dog already knows. Most owners are surprised by how long it is. Then check that everyone in the house uses the same words, and swap any that sound alike, like "no" and "go", for clearer options.
QUICK CHECK
ā Most dogs understand around 80 to 200 words
ā A few gifted dogs learn the names of hundreds of toys
ā Dogs process both the word and the tone of voice
ā Action words are easier for most dogs than toy names
ā Use the same short, clear word for the same thing every time
ONE-TO-ONE HELP
Help with training that doesn't stick
If your dog seems to ignore what you ask, or knows a cue at home but not anywhere else, I can help you work out why and build a plan in an online Dog Behaviour Consultation from wherever you are.
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FAQs
How many words can a dog learn?
Most dogs learn around 80 to 200 words and phrases, with an average of about 165. A few exceptional dogs learn over 1,000.
How many words do dogs understand?
They understand the words that are used consistently and linked to something that matters to them, like food, walks, play and people's names.
Do dogs understand words or just tone?
Both. Brain scans show dogs process the meaning of words separately from the tone, and they respond best when the two match.
What dog knew the most words?
Chaser, a Border Collie, learned the names of 1,022 toys with her owner, Professor John Pilley.
Can any dog learn the names of toys?
Some can, but it's harder than many owners expect. Action words like "sit" and "down" are much easier for most dogs.
ABOUT THE AUTHOR
Renee Patience Ā· National Dog Trainer of the Year 2025
Founder and head trainer of Paws Academy, with more than 30 years training dogs and a Level 6 Diploma in Applied Canine Behaviour. Renee has competed in agility, obedience and heelwork to music across the UK, including at Crufts and Olympia, has appeared on CBBC, and is the author of the Modern Training Guides and the Modern Breed Handbook series. Pictured with her boxer, Kookie.
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