Modifiers matching plastic:

• inert,
• appropriate,
• common,
• automotive,
• nonpolar,
• rigid,
• industrial,
• safe,
• flexible,
• hard,
• biodegradable,
• color,
• special,
• impermeable,
• colored,
• fibrous,
• useful,
• heavy,
• basic,
• viscous,
• thermosetting,
• thermal,
• new,
• technical,
• suitable,
• durable,
• soft,
• black,
• synthetic,
• stable,
• polar,
• slippery,
• clear,
• thermoset,
• sensitive,
• organic,
• convenient,
• over,
• washable,
• smooth,
• modern,
• commercial,
• strong,
• thick,
• conventional,
• difficult,
• amorphous,
• expanded,
• tough,
• thin,
• transparent,
• resilient,
• translucent,
• solid,
• traditional,
• corrosive,
• standard,
• resistant,
• brittle,
• lightweight,
• liquid,
• brilliant,
• opaque,
• light,

Simple categories matching tough:

• material,
• stain,
• perennial,
• bronze,
• annual,
• tile,
• meat,
• toy,
• state,
• substance,
• issue,
• food,
• textile,
• surface,
• fabric,
• vine,
• appendage,
• exercise,
• condition,
• item,
• veggie,
• resin,
• soil,
• metal,
• times,
• workwear,
• vegetable,
• area,
• hardwood,
• subject,
• situation,
• plant,
• fruit,
• rock,
• seed,
• tissue,
• spice,
• alloy,
• solid,
• leaf,
• part,
• herb,
• stone,
• location,
• stuff,
• fiber,
• shrub,
• fibre,
• thing,
• residue,
• group,
• application,
• hide,
• animal,
• plastic,
• decision,
• contaminant,
• coating,
• iron,
• sheet,
• junk,
• object,
• topic,
• paper,
• fish,
• job,
• substrate,
• structure,
• case,
• industry,
• grass,
• polymer,
• wood,