Soft
Soft adjective - Giving easily to the touch.
Usage example: soft mattresses make it very easy to fall asleep, but they have a tendency to get lumpy
Slack is a synonym for soft in increase topic. In some cases you can use "Slack" instead an adjective "Soft", when it comes to topics like infirm, flabby.
Mutual synonyms
Cite this Source
Slack and Soft. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/soft/slack
Soft & Slack. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/soft/slack>.
Slack or Soft. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/soft/slack.
Google Ngram Viewer shows how "soft" and "slack" have occurred on timeline