Therapist calling alters 'parts' instead of 'alters'

@another.day that’s kind of how my alters are like. Some of them get offended when they are referred to as parts, not alters. Technically my diagnosis is OSDD-1a, but I’m thinking it’s DID. I’m not sure, my therapist says they aren’t separated enough to be called alters, but they all have their own name, age, pronouns, and gender. So I feel like that does make them separate enough. What are your thoughts?