斉 （セイ） Qi (kingdom in China during the Spring and Autumn Period and the Period of the Warring States), Ch'i

斉唱 （セイショウ） singing in unison, chanting in unison

一斉 （イッセイ） simultaneous, all at once

整斉 （セイセイ） arranged, organized, orderly, neat

斎行 （サイコウ） carrying out (a religious festival or ceremony)

斉衡 （サイコウ） Saikō era (854.11.30-857.2.21)

等しい （ひとしい） equal, identical, the same, no different (from), just like, equivalent

等しく （ひとしく） equally, evenly, similarly, alike, just as ..., as soon as ..., the moment (that) ..., immediately upon ...