artificial wood; faux wood
Refers to wood-like materials made from plastic, composite, or other synthetic substances, used in furniture, decking, and construction.
This deck is made of artificial wood, so it doesn't rot easily.
Furniture made of faux wood is easy to maintain.
Compound of 人工 (じんこう, 'artificial') and 木 (もく, 'wood'). A straightforward modern coinage.