diaper 0 antonyms and opposites of diaper. Noun — An absorbent garment worn around a baby's bottom to catch urine and feces. Synonyms for diaper diap diapee diapy diapie didee didie diddy didy dipe hippins napkin nappy pamper Pampers dip gamer pants gaming pants omutsu padding pamp pampie pamps ← Back to the full definition of diaper