Modifiers matching signal:

• critical,
• analog,
• moving,
• audible,
• real,
• large,
• natural,
• atomic,
• private,
• electromagnetic,
• acoustic,
• visual,
• internal,
• white,
• molecular,
• biological,
• complex,
• physiological,
• verbal,
• actual,
• clear,
• noisy,
• technical,
• electrical,
• transient,
• broadband,
• special,
• defined,
• communicative,
• remote,
• mechanical,
• intermediate,
• external,
• functional,
• financial,
• harmonic,
• larger,
• interactive,
• auxiliary,
• stray,
• size,
• related,
• global,
• typographical,
• rapid,
• perceivable,
• specialized,
• slow,
• audiovisual,
• endogenous,
• dynamic,
• ambient,
• chemical,
• electronic,
• fast,
• physical,
• cellular,
• discrete,
• peripheral,
• sexual,
• additional,
• individual,
• meaningful,
• abnormal,
• ancillary,
• diagnostic,
• original,
• resonant,
• telegraphic,
• multiple,
• developmental,
• useful,
• costly,
• loud,
• complicated,
• over,
• alert,
• single,
• metabolic,
• pyrotechnic,
• wideband,
• unique,
• distinct,
• social,
• static,
• negative,
• unwanted,
• nonverbal,
• positive,
• familiar,
• hemodynamic,
• visible,
• realistic,
• diverse,
• underlying,
• structured,
• linguistic,
• electromechanical,
• intrinsic,
• accidental,
• standard,
• interfering,
• pitched,
• respiratory,
• ionic,
• strong,
• localized,
• weather,
• demographic,
• heterogeneous,
• exogenous,
• extraneous,
• random,
• directional,
• stereo,
• medical,
• accessible,
• primitive,
• logical,
• mental,
• tonal,
• vocal,
• extra,
• abstract,
• relevant,
• sensorial,
• auditory,
• outside,
• identifiable,
• extracellular,
• out,
• practical,
• graphic,
• digital,
• subtle,
• chaotic,
• pedestrian,
• neural,
• level,
• systemic,
• behavioural,
• seasonal,
• false,
• symbolic,
• objective,
• clinical,
• small,
• elementary,
• fixed,
• regular,
• physiologic,
• typical,
• insignificant,
• informational,
• informative,
• seismic,
• attractive,
• percussive,
• local,
• significant,
• undesired,
• incoming,
• electric,
• repetitive,
• rhythmic,
• environmental,
• traditional,
• everyday,
• perceptible,
• primary,
• common,
• continuous,
• weak,
• normal,
• biomedical,
• unintentional,
• vital,
• measurable,
• basic,
• nonrandom,
• plastic,
• difficult,
• periodic,
• high,
• binary,
• simple,
• specified,
• intermittent,
• driving,
• important,
• world,
• unpredictable,
• graphical,
• light,
• secondary,
• cultural,
• stationary,
• off,
• intracellular,
• behavioral,
• linear,
• erroneous,
• male,
• detectable,
• temporal,
• sensory,

Simple categories matching endogenous:

• compound,
• volatile,
• corticoid,
• substance,
• estrogen,
• activator,
• hormone,
• carbohydrate,
• steroid,
• factor,
• substrate,
• system,
• pigment,
• corticosteroid,
• sugar,
• agent,
• change,
• catecholamine,
• protein,
• monoamine,
• cation,
• metabolite,
• gene,
• ligand,
• pathogen,
• variable,
• molecule,
• control,
• androgen,
• constituent,
• opsonin,
• process,
• chemical,
• protease,
• solute,
• nucleoside,
• component,
• vasoconstrictor,
• reactant,
• vasopressor,
• neurotransmitter,
• material,
• peptide,
• proteinase,
• signal,
• fluid,
• acid,
• amine,
• diamine,
• sterol,
• virus,
• glucocorticoid,
• phosphatase,
• soporific,
• damage,
• cofactor,
• lipid,
• lipoprotein,
• macromolecule,
• receptor,
• buffer,
• nucleotide,
• chromophore,
• antigen,
• acceptor,
• contaminant,
• ion,
• enzyme,
• cause,
• metal,
• polysaccharide,