| aerospace | (noun) the atmosphere and outer space considered as a whole | - |
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| airspace | (noun) the atmosphere above a nation that is deemed to be under its jurisdiction | - |
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| (noun) the space in the atmosphere immediately above the earth | Synonyms: air space |
| backspace | (noun) the typewriter key used for back spacing | Synonyms: backspace key, backspacer |
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| carapace | (noun) hard outer covering or case of certain organisms such as arthropods and turtles | Synonyms: cuticle, shell, shield |
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| crawlspace | (noun) low space beneath a floor of a building; gives workers access to wiring or plumbing | Synonyms: crawl space |
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| cyberspace | (noun) a computer network consisting of a worldwide network of computer networks that use the TCP/IP network protocols to facilitate data transmission and exchange | Synonyms: internet, net |
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| headspace | (noun) the volume left at the top of a filled container (bottle or jar or tin) before sealing | - |
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| pace | (noun) a step in walking or running | Synonyms: stride, tread |
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| (noun) the relative speed of progress or change | Synonyms: rate |
| (noun) a unit of length equal to 3 feet; defined as 91.44 centimeters; originally taken to be the average length of a stride | Synonyms: yard |
| (noun) the distance covered by a step | Synonyms: footstep, step, stride |
| (noun) the rate of moving (especially walking or running) | Synonyms: gait |
| (noun) the rate of some repeating event | Synonyms: tempo |
| space | (noun) the unlimited expanse in which everything is located | Synonyms: infinite |
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| (noun) (printing) a block of type without a raised letter; used for spacing between words or sentences | Synonyms: quad |
| (noun) a blank character used to separate successive words in writing or printing | Synonyms: blank |
| (noun) a blank area | Synonyms: blank space, place |
| (noun) one of the areas between or below or above the lines of a musical staff | - |
| (noun) an area reserved for some particular purpose | - |
| (noun) any location outside the Earth's atmosphere | Synonyms: outer space |
| (noun) an empty area (usually bounded in some way between things) | - |
| (noun) the interval between two times | Synonyms: distance |
| subspace | (noun) a space that is contained within another space | - |
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| workspace | (noun) space allocated for your work (as in an office) | - |
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