Modifiers matching plastic:

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

Simple categories matching tough:

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