Grumbling
Mutter
Mutter noun - A complaint uttered in a low and indistinct tone.
Mutual synonyms
Cite this Source
Mutter and Grumbling. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/grumbling/mutter
Grumbling & Mutter. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/grumbling/mutter>.
Mutter or Grumbling. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/grumbling/mutter.
Google Ngram Viewer shows how "grumbling" and "mutter" have occurred on timeline