Cross
Cross verb - To be unfaithful or disloyal to.
Join forces and cross are semantically related. In some cases you can use "Join forces" instead a verb "Cross".
Join forces
Join forces verb - Work together on a common enterprise or project.
Cross and join forces are semantically related. Sometimes you can use "Cross" instead a verb phrase "Join forces".
Both terms in one sentence
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Crisis Cross Over: The previous film linked Mothra and Godzilla but this one had Rodan coming in to join forces against a new enemy.
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After that, in "The Day of the Doctor", we have the bombshell that Gallifrey survived the Time War after all—thanks to a handy piece of Galifreyan technology that allowed all incarnations of the Doctor (past, present, and future) to cross timelines and join forces.
Source: Nothing Is the Same Anymore
Cite this Source
Join forces and Cross. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/cross/join_forces
Cross & Join forces. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/cross/join_forces>.
Join forces or Cross. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/cross/join_forces.
Google Ngram Viewer shows how "cross" and "join forces" have occurred on timeline