फ़्लैशकार्ड

Both so and such act as intensifiers that heighten the degree or intensity of a description. So strengthens a specific quality or manner of action, answering how strong or in what way. Such strengthens an entity, experience, or concept embodied in a noun phrase, highlighting what kind of person, thing, or event is being discussed.

The train was so crowded that several passengers waited for the next service.