There are many synonyms for the phrase "subscribe for", which means to sign up or register for a service, newsletter, or publication. One common synonym is "enroll in", which implies a more formal process of joining or registering for a program. Another synonym is "sign up for", which implies a more casual or informal process. Other synonyms include "join", "register", "become a member", "enlist", "opt in", and "subscribe to". These words all convey the idea of actively choosing to receive information or participate in a service on a regular basis. Whether you are enrolling in a course or signing up for a newsletter, there are many ways to subscribe for the things that interest you.