Fall in
Fall in verb - Break down, literally or metaphorically.
To join
Mutual synonyms
Both terms in one sentence
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Being through it as a Human Sacrifice is what drove Saint Hakushin to fall in despair and then to join Naraku.
Source: Buried Alive -
Being fed up with seeing all the girls fall in love with high school athletes, he decides to join a sports-club himself.
Source: Manga / Mr. Fullswing - Horrible, on the other hand, is a Mad Scientist who aspires to join the Evil League of Evil, stalks Penny, steals some Unobtainium, tries to commit another heist before being foiled by Hammer, and attempts to Murder the Hypotenuse after Penny and Hammer fall in love.
Cite this Source
To join and Fall in. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/fall_in/to_join
Fall in & To join. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/fall_in/to_join>.
To join or Fall in. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/fall_in/to_join.
Google Ngram Viewer shows how "fall in" and "to join" have occurred on timeline