主席【しゅせき】
head, chief, chairman, governor, president, top student, head of the class, top seat, first desk (in orchestra)
議席【ぎせき】
parliamentary seat
出席【しゅっせき】
attendance, presence, appearance
席【せき】
seat, location (of a gathering, etc.), place, position, post
席上【せきじょう】
at the meeting, on the occasion
座席【ざせき】
seat
欠席【けっせき】
absence, non-attendance
客席【きゃくせき】
guest seating (e.g. theater, stadium), passenger seat (e.g. taxi), audience
満席【まんせき】
full house, all seats occupied, fully occupied
即席【そくせき】
extempore, impromptu, improvised, ad-lib, off-the-cuff, instant
宴席【えんせき】
banquet, dinner party
着席【ちゃくせき】
taking a seat, sitting down (in one's seat)