Modifiers matching microbe:

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

Simple categories matching contagious:

• substance,
• illness,
• process,
• disease,
• nature,
• malady,
• agent,
• affliction,
• behavior,
• bug,
• condition,
• disorder,
• situation,
• thing,
• infection,
• virus,
• pathogen,
• microbe,