If not
If not adverb - Perhaps; indicating possibility of being more remarkable (greater or better or sooner) than.
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Synonyms for If not
While and if not are semantically related. In some cases you can use "While" instead a conjunction phrase "If not".
While
While conjunction - At or during the time that.
If not and while are semantically related. Sometimes you can use "If not" instead a conjunction "While".
Mutual synonyms
Cite this Source
While and If not. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/if_not/while
If not & While. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/if_not/while>.
While or If not. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/if_not/while.
Google Ngram Viewer shows how "if not" and "while" have occurred on timeline