# Understanding synonym relationships
✨With the **Smart Product Filter & Search** app, you can improve your store's search results by using **Synonyms** — different words that mean the same thing.
But did you know you can control *how* these synonyms behave using two types of relationships?
Let’s break them down.
***
### 🔹**Inferred**
In the **Inferred** relationship, the app will only match results from one direction.
#### Example:
If you define:
```
T-shirt → Shirt
```
Then:
* A search for **T-shirt** will show results for **Shirt**
* But a search for **Shirt** will NOT show results for **T-shirt**
✅ Use this when you want one keyword to include others in the results, but not the other way around.
***
### 🔹**Equivalence**
In the **Equivalence** relationship, the app will match both directions.
#### 💡Example:
If you define:
```
T-shirt ↔ Shirt
```
Then:
* A search for **T-shirt** will show results for **Shirt**
* A search for **Shirt** will also show results for **T-shirt**
✅ Use this when all the terms should always return the same set of products.
***
### 🧠 Tips
* Use **Inferred** if you want to direct traffic from general terms to more specific ones (or vice versa).
* Use **Equivalence** when all terms mean the same thing and should return identical results.
* Keep your synonym groups clean and relevant to avoid confusing search results.
***
### 💬 Need Help?
If you need assistance or have questions, feel free to reach out:\
📧 ****
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