Spark plug
Spark plug noun - Electrical device that fits into the cylinder head of an internal-combustion engine and ignites the gas by means of an electric spark.
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Synonyms for Spark plug
Upper and spark plug are semantically related. In some cases you can use "Upper" instead a noun phrase "Spark plug".
Upper
Upper noun - The higher of two berths.
Spark plug and upper are semantically related. Sometimes you can use "Spark plug" instead a noun "Upper".
Cite this Source
Upper and Spark plug. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/spark_plug/upper
Spark plug & Upper. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/spark_plug/upper>.
Upper or Spark plug. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/spark_plug/upper.
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