Behind the back
On the sly and behind the back are semantically related. In some cases you can use "On the sly" instead an adverb phrase "Behind the back".
On the sly
On the sly adverb - In a furtive manner.
Behind the back and on the sly are semantically related. You can use "Behind the back" instead an adverb phrase "On the sly".
Mutual synonyms
Cite this Source
On the sly and Behind the back. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/behind_the_back/on_the_sly
Behind the back & On the sly. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/behind_the_back/on_the_sly>.
On the sly or Behind the back. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/behind_the_back/on_the_sly.
