Modifiers matching hydrocarbon:

• toxic,
• acetylenic,
• light,
• aromatic,
• neutral,
• saturated,
• viscous,
• regulated,
• volatile,
• liquid,
• nitrogenous,
• fluid,
• vaporizable,
• soluble,
• supercritical,
• dangerous,
• unsaturated,
• gaseous,
• solid,
• liquifiable,
• stable,
• typical,
• dilute,
• alternative,
• synthetic,
• particular,
• useful,
• aliphatic,
• available,
• simple,
• heavy,
• frozen,
• refined,
• polygonal,
• bound,
• familiar,
• planar,
• small,
• clean,
• conventional,
• natural,
• valuable,
• important,
• hazardous,
• hard,
• airborne,
• dark,
• main,
• acyclic,
• ordinary,
• pure,
• conjugated,
• molecular,
• underground,
• cyclic,
• carcinogenic,
• complicated,
• nonpolar,
• intermediate,
• industrial,
• hydrophobic,
• inert,
• reactive,
• individual,
• floating,
• basic,
• lighter,
• desirable,
• dissolved,
• heavier,
• model,
• combustible,
• single,
• base,
• essential,
• commercial,
• cheap,
• flammable,
• residual,
• minor,
• linear,
• liquefied,
• complex,
• greasy,
• organic,
• common,
• lower,

Simple categories matching lower:

• plant,
• reptile,
• quality,
• vertebrate,
• part,
• limb,
• mammal,
• reward,
• teleost,
• organism,
• food,
• animal,
• microorganism,
• energy,
• hydrocarbon,
• extremity,
• chordate,
• body,
• expense,
• level,
• creature,
• thing,
• unit,
• area,
• bird,
• state,
• meat,
• species,
• eukaryote,
• alcohol,
• emotion,
• invertebrate,
• group,
• tracheophyte,
• fish,
• amniote,