Religion
Buddhism
\bb(uddh(?:is[mt]))\b
B\1
Christianity
\bc(hristian(?:|ity|s))\b
C\1
Hinduism
\bh(indu(?:|ism|s))\b
H\1
Islam
\bi(slam(?:|ic|is[mt]))\b
I\1
Judaism
\bj(udai(?:c|sm))\b
J\1
Rastafarianism
\br(astafarian(?:|ism|s))\b
R\1
Sikhism
\bs(ikh(?:|ism))\b
S\1
Muslim
\bmohammedan\b
Muslim