Trouble
Trouble verb - To experience concern or anxiety.
To frighten and trouble are semantically related. In some cases you can replace phrase "To frighten" with "Trouble", this terms are similar.
To frighten
Trouble and to frighten are semantically related. You can use "Trouble" instead a verb phrase "To frighten".
Cite this Source
To frighten and Trouble. (2016). Retrieved 2026, July 31, from https://thesaurus.plus/related/trouble/to_frighten
Trouble & To frighten. N.p., 2016. Web. 31 Jul. 2026. <https://thesaurus.plus/related/trouble/to_frighten>.
To frighten or Trouble. 2016. Accessed July 31, 2026. https://thesaurus.plus/related/trouble/to_frighten.
Google Ngram Viewer shows how "trouble" and "to frighten" have occurred on timeline