Modifiers matching membrane:

• biological,
• collagenous,
• impervious,
• active,
• metallic,
• refractory,
• logical,
• elastic,
• flexible,
• protective,
• heterogeneous,
• thin,
• macromolecular,
• extracellular,
• impermeable,
• epithelial,
• resonant,
• circular,
• mucous,
• mucosal,
• permeable,
• synthetic,
• fetal,
• cellular,
• waterproof,
• biologic,
• warm,
• continuous,
• thick,
• porous,
• homogeneous,
• intact,
• multicellular,
• inorganic,
• excitable,
• vascular,
• proteinaceous,
• pliable,
• sensitive,
• moist,
• nonporous,
• intracellular,
• internal,
• imperforate,
• natural,

Simple categories matching porous:

• material,
• object,
• surface,
• semiconductor,
• portion,
• stone,
• tree,
• product,
• food,
• packing,
• rock,
• barrier,
• substrate,
• carrier,
• bag,
• item,
• space,
• medium,
• softwood,
• polymer,
• membrane,
• mass,
• leather,
• container,
• gemstone,
• wood,
• solid,
• part,
• tissue,
• unit,
• mineral,
• oxide,
• thing,
• pavement,
• fibre,
• cloth,
• fabric,
• furnishing,
• body,
• formation,
• masonry,
• foam,
• powder,
• filter,
• film,
• soil,
• pigment,
• pad,
• paper,
• clothes,
• implement,
• enclosure,
• floor,
• layer,
• area,
• fomite,
• compound,
• tile,
• constituent,
• sediment,
• fiber,
• aggregate,
• insulation,
• rubber,
• substance,
• ground,
• foodstuff,
• clothing,
• support,
• silk,
• particle,
• aquifer,
• gem,
• papers,
• bed,
• sheet,
• filler,
• flooring,
• molecule,
• obstacle,
• metal,
• region,
• fuel,
• coating,
• hardwood,
• paving,
• system,
• wall,
• article,
• carbon,
• electrode,
• sorbent,
• mold,
• hose,
• structure,
• web,
• artifact,
• property,