Modifiers matching cover:

• weak,
• impermeable,
• restricted,
• protective,
• wet,
• heavy,
• respiratory,
• impervious,
• open,
• natural,
• free,
• dermal,
• metallic,
• aesthetic,
• movable,
• thick,
• floating,
• external,
• thin,
• rigid,
• painted,
• delicate,
• small,
• weather,
• basic,
• waterproof,
• flat,
• loose,
• vegetative,
• outdoor,
• hard,
• temporary,
• dead,
• additional,
• isolated,
• absorbent,
• sterile,
• light,
• appropriate,
• necessary,
• large,
• supporting,
• functional,
• shallow,
• upland,
• fixed,
• overhead,
• woody,
• decorative,
• removable,
• personal,
• transparent,
• common,
• dense,
• resistant,
• little,
• unreachable,
• soft,
• handmade,
• under,
• suitable,
• portable,
• pedestrian,
• shiny,

Simple categories matching sterile:

• surface,
• needle,
• container,
• item,
• thing,
• supply,
• tool,
• cover,
• instrument,
• individual,
• equipment,
• tube,
• device,
• hybrid,
• bottle,
• condition,
• food,
• sediment,
• implement,
• material,
• package,
• medium,
• liquid,
• carrier,
• fluid,
• organism,
• system,
• location,
• attire,
• preparation,
• object,
• procedure,
• cutter,
• animal,
• article,
• vessel,
• sheath,
• solution,
• soil,