There are many synonyms for the word "hothousing," which refers to intense and demanding training or education. Some other words that can be used to convey a similar meaning include "coaching," "training," "mentoring," "tutoring," "drilling," "cramming," "intensive instruction," and "accelerated learning." Each of these words carries slightly different connotations and shades of meaning, but they all suggest an experience that is rigorous, immersive, and focused on achieving a particular goal. Whether you're looking for synonyms for professional development or academic enrichment, there are plenty of options to choose from to describe a hothousing experience.