Modifiers matching skeleton:

• metal,
• molecular,
• complex,
• invertebrate,
• bulky,

Simple categories matching molecular:

• phosphorus,
• property,
• system,
• imaging,
• alteration,
• gas,
• information,
• entity,
• device,
• variable,
• polymer,
• solute,
• quantity,
• process,
• state,
• assembly,
• parasite,
• substance,
• medicine,
• particle,
• component,
• composition,
• analysis,
• surface,
• parameter,
• nutrition,
• condition,
• biology,
• fiber,
• solvent,
• shape,
• feature,
• technology,
• compound,
• measurement,
• response,
• concept,
• constituent,
• thing,
• selectivity,
• signal,
• event,
• alcohol,
• carbon,
• force,
• cloud,
• substrate,
• group,
• laser,
• constant,
• track,
• carbonyl,
• structure,
• factor,
• transformation,
• behavior,
• approach,
• marker,
• project,
• data,
• hydrocarbon,
• skeleton,
• contamination,
• physics,
• terms,
• material,
• unit,
• concentration,
• aggregate,
• geometry,
• transport,
• medium,
• ion,
• crystal,
• adduct,
• solid,
• trap,
• modification,
• activity,
• food,
• adaptation,
• investigation,
• size,
• characteristic,
• container,
• interaction,
• solution,
• mechanism,
• trait,
• level,
• movement,
• fluid,
• space,
• cause,
• barrier,
• film,
• weight,
• formation,
• gel,
• research,
• landmark,
• function,
• therapy,
• bioscience,
• machinery,
• motion,
• evolution,
• aldehyde,
• mixture,
• scale,
• rest,
• contaminant,
• discipline,
• fragment,
• change,
• precursor,
• reorientation,
• machine,
• energy,
• oxygen,
• chain,
• complex,
• carrier,
• work,
• carbohydrate,
• architecture,
• study,
• aspect,
• reaction,
• phenomenon,
• atmosphere,
• macromolecule,
• hydride,
• repair,
• line,
• attribute,
• form,
• protein,
• chains,
• halogen,
• layer,
• science,
• displacement,
• liquid,
• topology,