Modifiers matching athletics:

• recreational,
• light,
• seasonal,
• extracurricular,
• professional,
• heavy,
• strenuous,
• vigorous,
• intercollegiate,
• organized,
• individual,
• overhead,
• interscholastic,
• indoor,
• intramural,
• competitive,
• favourite,
• aggressive,

Simple categories matching aggressive:

• behaviour,
• fish,
• pet,
• track,
• animal,
• bird,
• sport,
• solution,
• enzyme,
• predator,
• socialization,
• ant,
• plant,
• interaction,
• athletics,
• acid,
• malignancy,
• vegetable,
• environment,
• cleaners,
• act,
• liquid,
• gas,
• nature,
• fluid,
• cargo,
• insect,
• behavior,
• chemical,
• shrub,
• equine,
• invertebrate,
• prey,
• pest,
• therapy,
• beast,
• neoplasm,
• monster,
• tumor,
• offence,
• lymphoma,
• component,
• motive,
• form,
• interference,
• dog,
• offense,
• measure,
• condition,
• disease,
• native,
• compound,
• outlet,
• lesion,
• cichlid,
• ion,
• creature,
• emotion,
• solvent,
• game,
• placental,
• care,
• reagent,
• agent,
• conflict,
• crime,
• illness,
• cancer,
• option,
• event,
• treatment,
• activity,
• feeder,
• grass,
• action,
• substance,
• bass,
• encounter,
• tetra,
• tree,
• medium,
• material,
• intervention,
• change,