Formal:
* Institution: This is a general term for any organized system or establishment.
* Academy: This is typically used for a higher education institution, often specializing in a particular field.
* College: Similar to academy, but often used for a specific institution of higher learning.
* University: A large institution of higher learning that offers a wide range of undergraduate and graduate programs.
* Establishment: A general term for any building or place where people gather for a specific purpose.
Informal:
* Classroom: This refers to the physical space where learning takes place.
* Learning place: A broad term for any place where someone can learn.
* Educational institution: A general term for any organization that provides education.
* Place of study: A broad term for any location where someone can learn.
Other:
* Training ground: This refers to a place where people are trained for a particular skill or profession.
* Nursery: This is specifically for young children.
* Kindergarten: A preschool program for children before they enter elementary school.
To choose the best synonym, consider the context and what you want to emphasize.