Slack
Slack adjective - Failing to give proper care and attention.
Slumberous and slack are semantically related. In some cases you can use "Slumberous" instead an adjective "Slack".
Slumberous
Slumberous adjective - Desiring or needing sleep.
Slack and slumberous are semantically related. Sometimes you can use "Slack" instead an adjective "Slumberous".
Mutual synonyms
Cite this Source
Slumberous and Slack. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/slack/slumberous
Slack & Slumberous. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/slack/slumberous>.
Slumberous or Slack. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/slack/slumberous.
Google Ngram Viewer shows how "slack" and "slumberous" have occurred on timeline