The terms pre-register and pre-registration are still used with hyphens, mainly for clarity. But most dictionaries now list the words without hyphens, as preregister and preregistration.
(Preregister, or pre-register means to apply or sign-up prior to an actual registration.) New students must pre-register so that the school can estimate its enrollment. After doctoral candidates preregister, they are evaluated to see if they meet the entrance criteria.
Yes you have to send an application form.
It is not hyphenated.
Motorcycle is not hyphenated
No it's not hyphenated.
words are only hyphenated when they have a separate meaning when separated than they do when hyphenated
It can be. Some words can be seen both hyphenated and non-hyphenated.
Yes it should be hyphenated.
No, "hardworking" is not hyphenated.
No. Well above is not hyphenated.
peace of mind is not hyphenated.
No, "homework" shouldn't be hyphenated.