On the fly and On the sly

On the fly

On the fly adverb - On the run or in a hurry.
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Synonyms for On the fly

On the sly and on the fly are semantically related. In some cases you can use "On the sly" instead an adverb phrase "On the fly".

On the sly

On the sly adverb - In a furtive manner.

On the fly and on the sly are semantically related. Sometimes you can use "On the fly" instead an adverb phrase "On the sly".
Cite this Source
On the sly and On the fly. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/on_the_fly/on_the_sly
On the fly & On the sly. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/on_the_fly/on_the_sly>.
On the sly or On the fly. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/on_the_fly/on_the_sly.