Without warning
When and without warning are semantically related. In some cases you can use "When" instead an adverb phrase "Without warning".
When
Without warning and when are semantically related. Sometimes you can use "Without warning" instead an adverb "When".
Mutual synonyms
Cite this Source
When and Without warning. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/without_warning/when
Without warning & When. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/without_warning/when>.
When or Without warning. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/without_warning/when.
Google Ngram Viewer shows how "without warning" and "when" have occurred on timeline