Modifiers matching skeleton:

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

Simple categories matching molecular:

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