Amoxicillin Amoxicillin antonyms If you know antonyms for Amoxicillin, then you can share it. Suggest antonym for Amoxicillin Amoxicillin synonyms augmentin penicillin antibiotic wonder drug tetracycline erythromycin streptomycin ampicillin sulfonamide sulfa drug Amoxil Full list of synonyms (16)