Shiite
Concise Oxford English Dictionary © 2008 Oxford University Press:
Shiite /ˈʃiːʌɪt/ (also Shi'ite)
▶noun an adherent of the Shia branch of Islam. ▶adjective relating to Shia.
– derivatives
Shiism /ˈʃiːɪz(ə)m/ (also Shi'ism) noun.
Shiism /ˈʃiːɪz(ə)m/ (also Shi'ism) noun.
'Shiite' also found in these Oxford entries:

