Tiers

17 clues
Rows
Decks
Ranks
Banks
Rungs
Floors
Strata
Layers
Levels
Galleries
Cake sections
Theater levels
Stadium sections
Seating sections
Theater sections
Stadium features
Parts of opera houses
Similar answers:
Aaarating
Aaatriptik
Aameeting
Aameetings
Aanti
Aarctic
Abasers
Abaters
Abating
Abatis
Abatises
Abattis
Abbatial
Abbreviating
Abbreviation
Abbreviations
Abcdaytimehosts
Abcmurders
Abducktion
Abducting