1. Comparatives: These words compare two things.
* bigger (than)
* faster (than)
* stronger (than)
* better (than)
* easier (than)
2. Agent Nouns: These words indicate a person or thing that performs an action.
* baker (bakes bread)
* painter (paints)
* singer (sings)
* writer (writes)
* player (plays)
3. Instruments or Tools: These words indicate a device used for a specific purpose.
* chopper (for chopping)
* cutter (for cutting)
* grinder (for grinding)
* mixer (for mixing)
* scanner (for scanning)
4. Location: These words indicate a place where something happens.
* bakery (where bread is baked)
* armory (where weapons are stored)
* library (where books are kept)
* gallery (where art is displayed)
* fishery (where fish are caught)
5. Other Uses: There are some words with "-er" that don't fit neatly into any of these categories. These might be:
* shorter (describing a shorter duration)
* warmer (describing a warmer temperature)
* closer (describing a closer proximity)
* tender (describing a more tender texture)
This is not an exhaustive list, but it gives you a good idea of the range of words that use the "-er" suffix.