Behind someone's back
On the sly and behind someone's back are semantically related in secretly topic. In some cases you can replace phrase "On the sly" with "Behind someone's back", this phrases are similar.
On the sly
On the sly adverb - In a furtive manner.
Behind someone's back and on the sly are semantically related in in secret topic. Sometimes you can replace phrase "Behind someone's back" with "On the sly", this phrases are similar.
Mutual synonyms
Cite this Source
On the sly and Behind someone's back. (2017). Retrieved 2026, August 01, from https://thesaurus.plus/related/behind_someone_s_back/on_the_sly
Behind someone's back & On the sly. N.p., 2017. Web. 01 Aug. 2026. <https://thesaurus.plus/related/behind_someone_s_back/on_the_sly>.
On the sly or Behind someone's back. 2017. Accessed August 01, 2026. https://thesaurus.plus/related/behind_someone_s_back/on_the_sly.