Appointment vs interview
1-interview = a formal meeting at which people ask you questions to see if you are suitable for a particular job, course of study, etc....
FOR EXAMPLE:
BAD❌: I was very nervous during the appointment and I'm sure they'll give the job to someone else.
GOOD✅: I was very nervous during the interview and I'm sure they'll give the job to someone else.
2-appointment = an arrangement that you have made to see a doctor, dentist, business person, etc at a particular time
3-You make an appointment to see a doctor, principal, business person, etc:
FOR EXAMPLE:
I've got an appointment to see Dr Ali on Tuesday.
Have/has/had an appointment
4- Interview=a formal meeting at which someone is asked questions in order to find out whether they are suitable for a job, course of study etc...
interview for
He has an interview next Thursday for a job on the Los Angeles Times.
.......... Have /has an interview