Prior to and Then

Prior to

Prior to preposition - Earlier than.

Then and prior to are semantically related. In some cases you can use "Then" instead an adverb phrase "Prior to".

Then

Then adverb - In addition to what has been said.
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Synonyms for Then

Prior to and then are semantically related. Sometimes you can use "Prior to" instead an adverb "Then".
Cite this Source
Then and Prior to. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/prior_to/then
Prior to & Then. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/prior_to/then>.
Then or Prior to. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/prior_to/then.
Google Ngram Viewer shows how "prior to" and "then" have occurred on timeline