Modifiers matching microbe:

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

Simple categories matching undesirable:

• activity,
• alteration,
• odour,
• behavior,
• location,
• taste,
• thought,
• experience,
• lipid,
• substance,
• defect,
• emotion,
• condition,
• trait,
• metabolite,
• conduct,
• constituent,
• particle,
• behaviour,
• trouble,
• plant,
• nutrient,
• mineral,
• event,
• property,
• email,
• light,
• animal,
• reaction,
• phase,
• cation,
• material,
• pattern,
• noise,
• adaptation,
• fluid,
• adduct,
• fauna,
• consequence,
• mammal,
• passion,
• algae,
• angle,
• action,
• flora,
• chemical,
• content,
• sediment,
• practice,
• mail,
• microorganism,
• scene,
• zone,
• state,
• residue,
• deposit,
• lie,
• website,
• filler,
• mutation,
• formation,
• propensity,
• growth,
• contaminant,
• item,
• code,
• waste,
• stabilizer,
• route,
• part,
• precipitate,
• feature,
• matter,
• agent,
• symptom,
• software,
• thing,
• outcome,
• surface,
• artifact,
• bug,
• weather,
• cell,
• elements,
• gas,
• bacteria,
• product,
• incident,
• compound,
• cause,
• sensation,
• pollutant,
• communication,
• vegetation,
• result,
• rodent,
• motive,
• organism,
• process,
• ingredient,
• use,
• layer,
• sector,
• volatile,
• area,
• quality,
• pest,
• flaw,
• character,
• motion,
• characteristic,
• change,
• complication,
• situation,
• microbe,
• attribute,
• industry,
• creature,
• occurrence,
• component,
• bird,
• vermin,
• metal,
• solid,
• phenomenon,
• object,
• status,
• pathogen,
• facility,