Synonyms and Antonyms of deficient
- A diet deficient in calcium can lead to weak bones.
- Woefully deficient eyesight kept him out of military service.
below par (or under)
A1, bang-up, banner, capital, choice, crackerjack, dandy, divine, excellent, exceptional, fabulous, fine, first-class, first-rate, grand, great, heavenly, high-test, jim-dandy, keen, marvelous (or marvellous), mean, neat, nifty, noble, par excellence, perfect, premium, prime, sensational, slick, splendid, stellar, sterling, superb, superior, superlative, supernal, swell, terrific, tip-top, top, top-notch, unsurpassed, wonderful
- too deficient in experience to handle the situation by himself
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