Modifiers matching microbe:

• damaging,
• real,
• environmental,
• primitive,
• pathogenic,
• model,
• animal,
• effective,
• harmful,
• hazardous,
• infectious,
• tiny,
• dangerous,
• cellular,
• useful,
• lethal,
• beneficial,
• unicellular,
• intestinal,
• small,
• invasive,
• undesirable,
• deadly,
• viable,
• intracellular,
• smaller,
• latent,
• invisible,
• indigenous,
• toxic,
• common,
• biological,
• nasty,
• anaerobic,
• photosynthetic,
• positive,
• waterborne,
• larger,
• conventional,
• new,
• higher,
• parasitic,
• destructive,
• opportunistic,
• unwanted,
• eukaryotic,
• heterotrophic,
• contagious,
• marine,

Simple categories matching unwanted:

• pest,
• state,
• item,
• particulate,
• vegetation,
• variation,
• treasure,
• organism,
• advertisement,
• material,
• illumination,
• intrusion,
• software,
• space,
• object,
• infection,
• container,
• chemical,
• fuel,
• substance,
• content,
• medium,
• odour,
• entity,
• fluid,
• branch,
• body,
• animal,
• insect,
• behavior,
• condition,
• ingredient,
• feature,
• shade,
• conduct,
• compound,
• friend,
• noise,
• energy,
• furniture,
• comment,
• blemish,
• folder,
• grub,
• coating,
• microorganism,
• movement,
• tissue,
• vermin,
• emotion,
• sound,
• impurity,
• adulterant,
• happening,
• smell,
• light,
• interference,
• code,
• entrant,
• predator,
• article,
• volatile,
• change,
• appliance,
• hardwood,
• souvenir,
• pet,
• deposit,
• intruder,
• message,
• instrument,
• inhabitant,
• odor,
• liquid,
• substrate,
• textile,
• intermediate,
• situation,
• person,
• residue,
• behaviour,
• hair,
• herbivore,
• piece,
• scavenger,
• bird,
• component,
• spam,
• solicitation,
• part,
• mammal,
• byproduct,
• input,
• soil,
• consequence,
• protein,
• child,
• disturbance,
• filler,
• critter,
• grass,
• communication,
• papers,
• emission,
• cell,
• portion,
• solid,
• stuff,
• effluent,
• trace,
• file,
• symptom,
• bacteria,
• response,
• gas,
• signal,
• contamination,
• email,
• user,
• thought,
• artefact,
• molecule,
• plant,
• artifact,
• surface,
• motion,
• rodent,
• creature,
• growth,
• elements,
• thing,
• feeder,
• extra,
• pollutant,
• stain,
• place,
• structure,
• constituent,
• nonsense,
• fish,
• mineral,
• panel,
• reptile,
• layer,
• tree,
• parasite,
• area,
• agent,
• literature,
• view,
• event,
• variable,
• bedfellow,
• ion,
• incident,
• acid,
• game,
• sediment,
• contaminant,
• advert,
• yeast,
• action,
• microbe,
• medication,
• document,
• germ,
• information,
• trait,
• mail,
• occurrence,
• atom,
• larva,
• metal,
• waste,
• target,
• solute,
• activity,
• matter,
• caller,
• fabric,
• phenomenon,
• species,
• fungus,
• acceleration,
• debris,
• pesticide,
• particle,
• program,
• people,
• reaction,
• process,
• nuisance,
• effect,
• equipment,