N3 - 式しき
equation, formula, ceremony
N3 - 正式せいしき
due form, official, formality
N2 - 儀式ぎしき
ceremony, rite, ritual, service
N2 - 形式けいしき
form, formality, format, math expression
N2 - 公式こうしき
formula, formality, official
N1 - 株式かぶしき
stock (company)
N1 - 式場しきじょう
ceremonial hall, place of ceremony (e.g. marriage)
N1 - 方式ほうしき
form, method, system
N1 - 様式ようしき
style, form, pattern