Completely
Completely adverb - To a full extent or degree.
Vastly and completely are semantically related. In some cases you can use "Vastly" instead an adverb "Completely".
Vastly
Vastly adverb - To a great degree.
Usage example: the team has vastly improved in the course of the season
Completely and vastly are semantically related. Sometimes you can use "Completely" instead an adverb "Vastly".
Nearby Word: vast
Mutual synonyms
Both words in one sentence
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However, Cneph the Creator is on a vastly higher order than any of them— albeit so completely non-interventionist that a few heretics think It may actually be a myth.
Source: Top God - Bug War - Insects vastly outnumber humans and have a completely different mindset.
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Despite being vastly superior to just about everything the army throws at her, not a single time does she transform into a mecha without getting completely smacked around.
Source: Anime / Comet Lucifer
Cite this Source
Vastly and Completely. (2016). Retrieved 2026, July 27, from https://thesaurus.plus/related/completely/vastly
Completely & Vastly. N.p., 2016. Web. 27 Jul. 2026. <https://thesaurus.plus/related/completely/vastly>.
Vastly or Completely. 2016. Accessed July 27, 2026. https://thesaurus.plus/related/completely/vastly.
Google Ngram Viewer shows how "completely" and "vastly" have occurred on timeline