Category Nuances for null:

• microbial,
• new,
• antibacterial,
• antimicrobial,
• hydrophilic,
• exogenous,
• related,
• veterinary,
• common,
• systemic,
• simple,
• innocuous,
• cationic,
• lipophilic,
• antibiotic,
• alternative,
• useful,
• therapeutic,
• important,
• inexpensive,
• bacteriostatic,
• oral,
• modern,
• traditional,
• cheap,
• small,
• sensitive,
• popular,
• active,
• conventional,
• effective,
• pharmaceutical,
• basic,
• pharmacological,
• soluble,
• safe,
• expensive,
• acidic,
• hydrophobic,
• potent,
• essential,
• prescribed,
• secondary,
• everyday,
• potential,
• animal,
• irritating,
• valuable,
• possible,
• powerful,
• topical,
• chemotherapeutic,
• single,

Simple Categories for null:

• medicine,
• ligand,
• antibacterial,
• antibiotic,
• agent,
• pharmaceutical,
• antimicrobial,
• cause,
• metabolite,
• medication,
• drug,
• inducer,
• substance,