Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun screwball

2 senses of screwball

Sense 1
crackpot, crank, nut, nut case, fruitcake, screwball -- (a whimsically eccentric person)
       => eccentric, eccentric person, flake, oddball, geek -- (a person with an unusual or odd personality)

Sense 2
screwball -- (a pitch with reverse spin that curves toward the side of the plate from which it was thrown)
       => pitch, delivery -- ((baseball) the act of throwing a baseball by a pitcher to a batter)

Antonyms of adj screwball

1 sense of screwball

Sense 1
crazy, half-baked, screwball, softheaded -- (foolish; totally unsound; "a crazy scheme"; "half-baked ideas"; "a screwball proposal without a prayer of working")

INDIRECT (VIA impractical) -> practical -- (concerned with actual use or practice; "he is a very practical person"; "the idea had no practical application"; "a practical knowledge of Japanese"; "woodworking is a practical art")

Similarity of adj screwball

1 sense of screwball

Sense 1
crazy, half-baked, screwball, softheaded -- (foolish; totally unsound; "a crazy scheme"; "half-baked ideas"; "a screwball proposal without a prayer of working")
       => impractical (vs. practical) -- (not practical; not workable or not given to practical matters; "refloating the ship proved impractical because of the expense"; "he is intelligent but too impractical for commercial work"; "an impractical solution")