• batural glass,
• matural glass,
• jatural glass,
• hatural glass,
• nztural glass,
• nstural glass,
• nwtural glass,
• nqtural glass,
• narural glass,
• nafural glass,
• nagural glass,
• nayural glass,
• na6ural glass,
• na5ural glass,
• natyral glass,
• nathral glass,
• natjral glass,
• natiral glass,
• nat8ral glass,
• nat7ral glass

The adjective form of "natural glass" is "glassy".

The plural form of "natural glass" is "natural glasses".

The singular form of "natural glass" is "natural glass". The word does not change in its singular form.