Be sullen
Lose heart and be sullen are semantically related. In some cases you can use "Lose heart" instead a verb phrase "Be sullen".
Lose heart
Be sullen and lose heart are semantically related. Sometimes you can use "Be sullen" instead a verb phrase "Lose heart".
Mutual synonyms
Related pairs
Cite this Source
Lose heart and Be sullen. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/be_sullen/lose_heart
Be sullen & Lose heart. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/be_sullen/lose_heart>.
Lose heart or Be sullen. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/be_sullen/lose_heart.
Google Ngram Viewer shows how "be sullen" and "lose heart" have occurred on timeline