Modifiers matching rhythm:

• natural,
• physiological,
• complex,
• biological,
• behavioral,
• special,
• normal,
• external,

Simple categories matching physiological:

• complication,
• process,
• discomfort,
• condition,
• intervention,
• fluctuation,
• status,
• motion,
• innovation,
• characteristic,
• drive,
• trait,
• attribute,
• factor,
• state,
• character,
• procedure,
• stressor,
• event,
• steroid,
• preparation,
• response,
• episode,
• dimension,
• compound,
• activity,
• damage,
• feature,
• barrier,
• change,
• signature,
• level,
• fluid,
• perturbation,
• matrix,
• tension,
• organs,
• fuel,
• protein,
• symptom,
• limit,
• task,
• work,
• chemical,
• topic,
• material,
• transition,
• irregularity,
• movement,
• illness,
• cue,
• perception,
• entity,
• abnormality,
• malady,
• space,
• development,
• adaptation,
• tremor,
• problem,
• data,
• reflex,
• impairment,
• amine,
• modification,
• tissue,
• action,
• molecule,
• point,
• component,
• structure,
• matter,
• consequence,
• purpose,
• sample,
• stress,
• requirement,
• interference,
• pressure,
• behavior,
• measurement,
• sign,
• quality,
• constant,
• ligand,
• indicator,
• agent,
• situation,
• disease,
• secretion,
• alteration,
• sensor,
• reaction,
• constituent,
• stimulus,
• location,
• stage,
• effect,
• makeup,
• limitation,
• hazard,
• benefit,
• dimer,
• disorder,
• property,
• sense,
• capacity,
• artifact,
• necessity,
• inducer,
• function,
• dependence,
• disturbance,
• trauma,
• phenomenon,
• injury,
• pattern,
• difference,
• organ,
• variable,
• criterion,
• parameter,
• failure,
• area,
• substrate,
• complaint,
• concomitant,
• mechanism,
• diagnosis,
• system,
• variation,
• arousal,
• solute,
• activator,
• anticoagulant,
• cause,
• quantity,
• shift,
• sound,
• measure,
• control,
• signal,
• carrier,
• vessel,
• marker,
• substance,
• information,
• study,
• manifestation,
• buffer,
• issue,
• rhythm,