Correct spelling


Correct spelling, explanation: the base word here is the verb to enroll to which we can add the -ment suffix in order to create a noun. This is a simple process, nothing really changes here, so two L’s stay where they stood.

Definition of enrollment:
1. To sign up for a course, a school, university, etc.
The number of papers and exams needed for enrollment in a law school was overwhelming.
The current drop in enrollment will likely affect both faculty and administrators.

Incorrect spelling


Incorrect spelling, explanation: enrolement is an incorrect word because considering word-formation processes, it should’ve been based on a non-existent base word to enrole. In English, there is no such word, so it cannot be used as a version of enrollment.