Fast asleep and Sound

Related terms

Fast asleep adjective - Sleeping deeply.

Show all Definitions

Sound and fast asleep are semantically related. In some cases you can use "Sound" instead an adjective phrase "Fast asleep".

Sound adjective - According to the rules of logic.

Show all Definitions

Fast asleep and sound are semantically related. Sometimes you can use "Fast asleep" instead an adjective "Sound".

Nearby Words: sounded, soundness, soundly, sounding, sounder

Cite this Source

Sound and Fast asleep. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/fast_asleep/sound

Fast asleep & Sound. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/fast_asleep/sound>.

Sound or Fast asleep. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/fast_asleep/sound.

Google Ngram Viewer shows how "fast asleep" and "sound" have occurred on timeline