Antonyms of adj unmethodical

1 sense of unmethodical

Sense 1
unmethodical -- (not efficient or methodical; "the project failed through unmethodical planning")

INDIRECT (VIA disorganized) -> organized -- (methodical and efficient in arrangement or function; "how well organized she is"; "his life was almost too organized")

Similarity of adj unmethodical

1 sense of unmethodical

Sense 1
unmethodical -- (not efficient or methodical; "the project failed through unmethodical planning")
       => disorganized (vs. organized), disorganised -- (lacking order or methodical arrangement or function; "a disorganized enterprise"; "a thousand pages of muddy and disorganized prose"; "she was too disorganized to be an agreeable roommate")