Antonyms of adj incongruous

1 sense of incongruous

Sense 1
incongruous (vs. congruous) -- (lacking in harmony or compatibility or appropriateness; "a plan incongruous with reason"; "incongruous behavior"; "a joke that was incongruous with polite conversation")

congruous (vs. incongruous), congruent -- (corresponding in character or kind)
        => harmonious -- (suitable and fitting; "the tailored clothes were harmonious with her military bearing")

Similarity of adj incongruous

1 sense of incongruous

Sense 1
incongruous (vs. congruous) -- (lacking in harmony or compatibility or appropriateness; "a plan incongruous with reason"; "incongruous behavior"; "a joke that was incongruous with polite conversation")
       => discrepant, inconsistent -- (not in agreement)
       => inappropriate, incompatible, out or keeping (predicate), unfitting -- (not in keeping with what is correct or proper; "completely inappropriate behavior")
       => inharmonious -- (lacking in harmony of parts; "an inharmonious (or incongruous) mixture of architectural styles")
       => ironic, ironical -- (characterized by often poignant difference or incongruity between what is expected and what actually is; "madness, an ironic fate for such a clear thinker"; "it was ironical that the well-planned scheme failed so completely")