Cap and Valve

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Cap noun - A small mass containing medicine to be taken orally.

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Valve and cap are semantically related. In some cases you can use "Valve" instead a noun "Cap".

Nearby Words: caps, capped, capping

Valve noun - A fixture for controlling the flow of a liquid.

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Cap and valve are semantically related. Sometimes you can use "Cap" instead a noun "Valve".

Nearby Word: valvular

For just this reason, gas cylinders are supposed to have a protective cap screwed over the valve at all times when not actually in use.

Source: Gas Cylinder Rocket
For the steam pipe example, a burst disk that can only withstand a certain amount of pressure, a spring-mounted pressure valve where the steam pressure escapes when greater than the spring tension, or a thermal relief valve that uses a metallic rod that lengthens when heated to raise the valve cap.

Source: Destruction Equals Off-Switch

Cite this Source

Valve and Cap. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/cap/valve

Cap & Valve. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/cap/valve>.

Valve or Cap. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/cap/valve.

Google Ngram Viewer shows how "cap" and "valve" have occurred on timeline