1. Containing heresy; contrary to orthodox belief.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• cretical,
• thoeretical,
• veritical,
• heretick,
• thearetical,
• teoretical,
• hiretical,
• thereotical,
• hermetical,
• theretical,
• theroetical,
• theratical,
• heritical,
• therotical,
• thoretical,
• retical,
• genetacal,
• herrtical,
• therapetical,
• duretical

• hearts,
• heartsick,
• heartache,
• heretic.

The adjective form of the word "heretical" is "heretic".

The plural form of the word "heretical" is "hereticals".

The singular form of the word "heretical" is "heretic"