Modifiers matching income:

• private,
• periodic,
• passive,
• local,
• corporate,
• monthly,
• alternative,
• financial,
• current,
• individual,
• personal,
• total,
• earned,
• unearned,
• primary,
• miscellaneous,
• significant,
• secondary,
• active,
• regular,
• australian,
• variable,
• domestic,
• economic,
• taxable,
• foreign,
• global,
• ordinary,
• out,
• fixed,
• outside,
• future,
• additional,
• related,
• movable,
• annual,
• independent,
• extra,
• ancillary,

Simple categories matching periodic:

• condition,
• process,
• structure,
• system,
• feature,
• signal,
• expenditure,
• medium,
• object,
• action,
• component,
• activity,
• movement,
• sound,
• shape,
• task,
• income,
• receipts,
• document,
• charge,
• backup,
• disturbance,
• occurrence,
• difficulty,
• curve,
• catastrophe,
• event,
• information,
• solid,
• pattern,
• behavior,
• review,
• publication,
• item,
• gathering,
• episode,
• layer,
• evaluation,
• bill,
• report,
• disaster,
• change,
• meeting,
• return,
• forum,
• cycle,
• work,
• statement,
• disclosure,
• function,
• insulator,
• communication,
• data,
• works,
• expense,
• payment,
• perturbation,
• service,
• phenomenon,
• storm,
• waveform,
• wave,
• lattice,
• hazard,
• rendezvous,
• material,
• property,
• line,
• motion,
• benefit,
• substrate,