How to spell CRASSVER correctly?

If you meant to type "crassver" but are seeking the correct spelling, it seems that you may be referring to the word "cross over". The term "cross over" signifies the act of moving from one point to another, often indicating a transition or shift.

• crasser This party is going to be much more crasser than our last one.
• crossover She's a talented singer, but her crossover appeal is limited.

Excatally

• exact
• exacted
• exactingly
• exactly
• exacts
• executable
• exotically
• extol
• inexactly
• oxtail