Modifiers matching appendage:

• developing,
• cutaneous,
• adult,
• specialized,
• epidermal,
• epithelial,
• elastic,
• delicate,
• turgid,
• soft,
• dermal,
• underwater,
• injured,
• flexible,
• mechanical,
• awkward,
• free,
• external,
• animal,
• complex,
• traditional,
• loose,
• detachable,
• smaller,
• biological,
• tough,
• outer,
• fleshy,
• mammalian,
• inert,
• related,
• anatomic,
• jointed,
• light,
• major,
• regular,
• new,
• fixed,
• small,
• hard,
• ectodermal,
• diverse,
• metal,
• rigid,
• sensory,
• movable,
• moving,
• distal,
• oscillating,
• conventional,

Simple categories matching tough:

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