8
technically
7
conceptually(adverb, immaterially, topically)
6
hypothetically(adverb, topically)
6
on paper(expression, idiom, adverb, theory)
5
in theory(expression, idiom, adverb)
5
abstractly(adverb, immaterially)
5
speculatively
4
conjecturally
4
presumably(adverb, likely, reasonably)
4
supposedly
3
in principle(expression, idiom)
3
imaginarily(adverb, immaterially)
3
metaphysically
3
notionally
3
principle
2
ideally
2
according
2
basically(adverb, topically)
2
fundamentally
2
in this sense
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APASmart Define. (2015). theoretically thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/theoretically/thesaurus/synonyms
ChicagoSmart Define. 2015. "theoretically thesaurus" https://smartdefine.org/theoretically/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, theoretically thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/theoretically/thesaurus/synonyms>.
MLASmart Define. "theoretically thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/theoretically/thesaurus/synonyms>