Fall asleep
Fall asleep verb - Change from a waking to a sleeping state.
To sleep and fall asleep are semantically related. In some cases you can replace phrase "To sleep" with "Fall asleep", this phrases are similar.
To sleep
Fall asleep and to sleep are semantically related. Sometimes you can use "Fall asleep" instead a verb phrase "To sleep".
Mutual synonyms
Related pairs
Both terms in one sentence
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After a pair of guards fall asleep while guarding an important figure, Cersei Lannister sarcastically says they should be allowed to sleep.
Source: Rhetorical Request Blunder -
An Odd Place to Sleep: Pikachu will fall asleep in front of the Snorlax doll if interacted with.
Source: Video Game / Pokémon Channel - Patapons (and enemies/bosses) can be put to sleep with the right units and weapons, although it's rare to see a boss fall asleep.
Source: Standard Status Effects
Cite this Source
To sleep and Fall asleep. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/fall_asleep/to_sleep
Fall asleep & To sleep. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/fall_asleep/to_sleep>.
To sleep or Fall asleep. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/fall_asleep/to_sleep.
Google Ngram Viewer shows how "fall asleep" and "to sleep" have occurred on timeline