Question: are hydroxide and hydroxyl the same?
Answer: Hydroxide - Hydroxide is a diatomic anion with chemical formula OH−. It consists of a hydrogen and an oxygen atom held together by a covalent bond, and carries a negative electric charge. Hydroxyl radical- {hydro- + oxy(gen) + -yl + radical} - The hydroxyl radical, •OH, is the neutral form of the hydroxide ion (OH-1).