Extra
Extra adverb - To a great degree.
On top and extra are semantically related. in in addition topic. In some cases you can use "On top" instead an adverb "Extra".
On top
Mutual synonyms
Both terms in one sentence
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This from Not Always Right — as usual, with extra delicious Hypocritical Humor on top.
Source: Contractual Purity -
Kaneki's attack on Eto drives her into a similar state, and her kakuja body begins undergoing a series of lovely mutations such as extra eyes and mouths on top of mouths.
Source: The Ophelia - In SATAZIUS, playing on Hard or Insane gives you an extra boss on the stage 5 Boss Bonanza and an extra Final Boss form on top of what you encounter on Normal difficulty.
Source: Hard Mode Perks
Cite this Source
On top and Extra. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/extra/on_top
Extra & On top. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/extra/on_top>.
On top or Extra. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/extra/on_top.
Google Ngram Viewer shows how "extra" and "on top" have occurred on timeline