Simplify the following text for a Grade 9 native English-speaking person.
Original: Ceramic may be used as an adjective describing a material , product or process ; or as a singular noun , or , more commonly , as a plural noun , ceramics .
Simplified: The word ceramic can be an adjective , and can also be used as a noun to refer to a ceramic material , or a product of ceramic manufacture . Ceramics may also be used as a singular noun referring to the art of making things out of ceramic materials .