The term 'plastic ingredient' refers to two substances commonly used in the production of plastic products. The first is RESIN, a five-letter word which is a naturally occurring or synthetic polymer that can be used as a glue or sealant. The second is styrene, a seven-letter word which is a synthetic aromatic hydrocarbon derived from petroleum and coal tar. Both substances are used in the production of plastic products such as containers, packaging, and toys.