As required
As required adverb - According to need (physicians use PRN in writing prescriptions).
Show all Definitions
Synonyms for As required
As needed is a synonym for as required. In some cases you can use "As needed" instead an adverb phrase "As required".
As needed
As needed adverb - According to need (physicians use PRN in writing prescriptions).
Usage example: add water as needed
Show all Definitions
Synonyms for As needed
As required is a synonym for as needed. You can use "As required" instead an adverb phrase "As needed".
Mutual synonyms
Cite this Source
As needed and As required. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/as_required/as_needed
As required & As needed. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/as_required/as_needed>.
As needed or As required. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/as_required/as_needed.
Google Ngram Viewer shows how "as required" and "as needed" have occurred on timeline