Really
Really adverb - To a great degree.
Usage example: really tired after staying up all night
Substantially and really are semantically related In some cases you can use "Substantially" instead an adverb "Really".
Substantially
Substantially adverb - For the most part.
Really and substantially are semantically related in to a large extent topic. Sometimes you can use "Really" instead an adverb "Substantially".
Mutual synonyms
Related pairs
Both words in one sentence
- Getting really old in the Dresdenverse gets you really stuck in your ways pretty substantially.
Source: Creature of Habit - This one deviates more substantially from established canon, but that really just helps it stand out on its own.
Source: Fanfic Recs / Star Wars - The second phase of the final battle in the third game takes a really long time, about twice the other two phases put together, but is substantially more mechanical and less fun.
Source: Goddamned Boss
Cite this Source
Substantially and Really. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/really/substantially
Really & Substantially. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/really/substantially>.
Substantially or Really. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/really/substantially.
Google Ngram Viewer shows how "really" and "substantially" have occurred on timeline