Altitude
Altitude noun - The distance of something or someone from bottom to top.
Levels
Both words in one sentence
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Both Sonic Rush games have levels like this for their sixth stage: the first game's Altitude Limit, and the second game's Sky Babylon.
Source: Levels Take Flight - In the PS1 game Sentinel Returns you actually had an ability which caused a random teleportation, using it caused you to appear on free square on the levels map that was either the same or lower altitude than your current but always a random location.
Source: Teleportation Misfire -
The Scinfaxi and Hrimfaxi submarines in 5 also count, as they are (eventually) the focus of their respective levels; each is also an aircraft carrier with separately targetable anti-aircraft weapons, and burst missiles that will kill you unless your altitude is at 5,000 feet or higher.
Source: Battleship Raid
Cite this Source
Levels and Altitude. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/altitude/levels
Altitude & Levels. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/altitude/levels>.
Levels or Altitude. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/altitude/levels.
Google Ngram Viewer shows how "altitude" and "levels" have occurred on timeline