| length | (noun) a section of something that is long and narrow | - |
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| (noun) the linear extent in space from one end to the other; the longest dimension of something that is fixed in place | - |
| (noun) continuance in time | Synonyms: duration |
| (noun) the property of being the extent of something from beginning to end | - |
| (noun) size of the gap between two places | Synonyms: distance |
| lengthening | (noun) the act of prolonging something | Synonyms: perpetuation, prolongation, protraction |
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| lengthiness | (noun) amount or degree or range to which something extends | Synonyms: extension, prolongation |
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| (noun) the consequence of being lengthened in duration | Synonyms: continuation, prolongation, protraction |
| strength | (noun) the property of being physically or mentally strong | - |
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| (noun) an asset of special worth or utility | Synonyms: forte, long suit, metier, speciality, specialty, strong point, strong suit |
| (noun) permanence by virtue of the power to resist stress or force | Synonyms: durability, enduringness, lastingness |
| (noun) the amount of energy transmitted (as by acoustic or electromagnetic radiation) | Synonyms: intensity, intensity level |
| (noun) capability in terms of personnel and materiel that affect the capacity to fight a war | Synonyms: military capability, military posture, military strength, posture |
| (noun) physical energy or intensity | Synonyms: force, forcefulness |
| (noun) capacity to produce strong physiological or chemical effects | Synonyms: effectiveness, potency |
| (noun) the power to induce the taking of a course of action or the embracing of a point of view by means of argument or entreaty | Synonyms: persuasiveness |
| (noun) the condition of financial success | - |
| strengthener | (noun) a device designed to provide additional strength | Synonyms: reinforcement |
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| strengthening | (noun) the act of increasing the strength of something | - |
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| (noun) becoming stronger | - |
| wavelength | (noun) the distance (measured in the direction of propagation) between two points in the same phase in consecutive cycles of a wave | - |
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| (noun) a shared orientation leading to mutual understanding | - |