Foster sister
Foster sister noun - Your foster sister is a female who is not a daughter of your parents but who is raised by your parents.
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Synonyms for Foster sister
Foster brother and foster sister are semantically related. In some cases you can replace phrase "Foster brother" with "Foster sister", this phrases are similar.
Foster brother
Foster brother noun - Your foster brother is a male who is not a son of your parents but who is raised by your parents.
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Synonyms for Foster brother
Foster sister and foster brother are semantically related. Sometimes you can replace phrase "Foster sister" with "Foster brother", this phrases are similar.
Mutual synonyms
Cite this Source
Foster brother and Foster sister. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/foster_sister/foster_brother
Foster sister & Foster brother. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/foster_sister/foster_brother>.
Foster brother or Foster sister. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/foster_sister/foster_brother.
Google Ngram Viewer shows how "foster sister" and "foster brother" have occurred on timeline