Antonyms of adj castellated

1 sense of castellated

Sense 1
embattled, battlemented, castled, castellated -- (having or resembling repeated square indentations like those in a battlement; "a crenelated molding")

INDIRECT (VIA fancy) -> plain -- (not elaborate or elaborated; simple; "plain food"; "stuck to the plain facts"; "a plain blue suit"; "a plain rectangular brick building")

Similarity of adj castellated

1 sense of castellated

Sense 1
embattled, battlemented, castled, castellated -- (having or resembling repeated square indentations like those in a battlement; "a crenelated molding")
       => fancy (vs. plain) -- (not plain; decorative or ornamented; "fancy handwriting"; "fancy clothes")