Antonyms of adj communicational

1 sense of communicational

Sense 1
communicational -- (used in communication; "he had few communicational grooves available for use")

INDIRECT (VIA communicative) -> uncommunicative, incommunicative -- (not inclined to talk or give information or express opinions)

Similarity of adj communicational

1 sense of communicational

Sense 1
communicational -- (used in communication; "he had few communicational grooves available for use")
       => communicative (vs. uncommunicative), communicatory -- (able or tending to communicate; "was a communicative person and quickly told all she knew"- W.M.Thackeray)