Is it goodmorning or good morning?
It is Good morning, not Goodmorning (i.e., the greeting “Good morning” is written as two words).
Bear in mind that what time is morning is often determined by the context (e.g., 2 a.m. is usually considered nighttime, but coworkers starting an early shift at this hour might greet each with “Good morning”).
QuillBot’s free Paraphraser tool can help you find alternatives to greetings such as “Good morning” in your writing.