Companion
Companion noun - A person frequently seen in the company of another.
Side effect and companion are semantically related. In some cases you can use "Side effect" instead a noun "Companion".
Nearby Words: companionable, companionship, companioned
Side effect
Side effect noun - A secondary and usually adverse effect of a drug or therapy.
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Synonyms for Side effect
Companion and side effect are semantically related. Sometimes you can use "Companion" instead a noun phrase "Side effect".
Mutual synonyms
Cite this Source
Side effect and Companion. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/companion/side_effect
Companion & Side effect. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/companion/side_effect>.
Side effect or Companion. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/companion/side_effect.
Google Ngram Viewer shows how "companion" and "side effect" have occurred on timeline