Common Words:
* Factory
* Story
* History
* Directory
* Territory
* Laboratory
* Inventory
* Repertory
* Repository
* Observatory
* Depository
* Salutatory
* Valedictory
* Mandatory
* Explanatory
* Introductory
* Inflammatory
* Dictatory
Less Common Words:
* Aviary
* Armory
* Conservatory
* Crematory
* Dormitory
* Grotto
* Oratory
* Purgatory
* Sanctuary
* Sepulchre
* Vestibule
* Vicinity
Note: The suffix "-tory" can indicate a place or location (e.g., factory, laboratory), a collection of something (e.g., inventory, directory), or a descriptive function (e.g., explanatory, mandatory).
This is not an exhaustive list, but it provides a good starting point for understanding words ending with "-tory."