Modifiers matching microbe:

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

Simple categories matching waterborne:

• bacteria,
• biohazard,
• disease,
• illness,
• contaminant,
• parasite,
• chemical,
• virus,
• pathogen,
• microorganism,
• particle,
• salt,
• agent,
• waste,
• metal,
• halide,
• component,
• solid,
• preservative,
• system,
• microbe,
• material,
• organism,