Modifiers matching bug:

• bad,
• larger,
• new,
• little,
• nasty,
• tiny,
• moving,
• beneficial,
• intestinal,
• friendly,
• colorful,
• adult,
• small,
• fixed,
• microscopic,
• social,
• large,
• flying,
• typical,
• cute,
• damaging,
• airborne,
• nocturnal,
• fast,
• common,
• harmful,
• undesirable,
• irritating,
• bigger,
• destructive,
• minute,
• deadly,
• predatory,
• aquatic,
• smaller,
• contagious,
• harmless,
• biting,
• pesky,

Simple categories matching contagious:

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