Upper layer
Upper part and upper layer are semantically related. In some cases you can use "Upper part" instead a noun phrase "Upper layer".
Upper part
Upper layer and upper part are semantically related. You can use "Upper layer" instead a noun phrase "Upper part".
Mutual synonyms
Cite this Source
Upper part and Upper layer. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/upper_layer/upper_part
Upper layer & Upper part. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/upper_layer/upper_part>.
Upper part or Upper layer. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/upper_layer/upper_part.
Google Ngram Viewer shows how "upper layer" and "upper part" have occurred on timeline