Yes, attendant is a Scrabble word!

Adjective

1. Being present (at meeting or event etc.) "attendant members of the congreation"

2. Following or accompanying as a consequence

Noun

1. Someone who waits on or tends to or attends to the needs of another

2. A person who is present and participates in a meeting

3. An event or situation that happens at the same time as or in connection with another