very (to a high degree): It gets very cold at night. The house looks very old.
extremely (to a very high degree): That was extremely interesting. I’m extremely sorry to keep you waiting.
really informal (very; extremely): I had a really good meal last night.
so informal (very; extremely): She is so cute. The dress was so beautiful.
highly (to a high degree or amount): Our staff are highly experienced.
exceedingly formal (to a very great degree): Some of the students have done exceedingly well. The room was exceedingly hot.
desperately (very much; extremely): These trees desperately need water.
remarkably (to a remarkable degree): The hotel has a remarkably good restaurant.