theater, play

芝居(しばい)	Play or theatrical performance – usually used by old people only.

劇(げき)	A play. (NOT used about kabuki or noh. – you got to say kabuki or noh if that’s what you mean!)

ショー	A Broadway musical

演劇(えんげき)	Pretty much the same as 劇:but a little more formal? Shakespeare is 演劇、 but a school play or Christmas pageant is 劇.