Concrete and Slack

Opposite meaning words

Concrete adjective - Existing in fact and not merely as a possibility.

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Slack is an antonym for concrete in hardened topic.

Slack adjective - Failing to give proper care and attention.

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Concrete is an antonym for slack.

Nearby Words: slacken, slackened, slackness, slacker, slacked

Cite this Source

Slack and Concrete. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/concrete/slack

Concrete & Slack. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/concrete/slack>.

Slack or Concrete. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/concrete/slack.

Google Ngram Viewer shows how "concrete" and "slack" have occurred on timeline