Extra
Extra adverb - To a great degree.
On top of that and extra are semantically related. in in addition topic. In some cases you can use "On top of that" instead an adverb "Extra".
On top of that
Extra and on top of that are semantically related. Sometimes you can replace term "Extra" with "On top of that", this terms are similar.
Mutual synonyms
Both terms in one sentence
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Some online retailers even included extra extras on top of that, such as t-shirts.
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On top of that, engaging extra boosters in your mech consumes the forcefield, and it's made from a highly toxic particles.
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Pajama-Clad Hero: The PJs "make you feel cozy", which shows by healing Isaac to full health and giving him four extra soul hearts on top of that.
Cite this Source
On top of that and Extra. (2016). Retrieved 2026, August 10, from https://thesaurus.plus/related/extra/on_top_of_that
Extra & On top of that. N.p., 2016. Web. 10 Aug. 2026. <https://thesaurus.plus/related/extra/on_top_of_that>.
On top of that or Extra. 2016. Accessed August 10, 2026. https://thesaurus.plus/related/extra/on_top_of_that.