Effect
Effect verb - To be the cause of (a situation, action, or state of mind).
Usage example: classroom discussions designed to effect a change in racial attitudes
Occasion is a synonym for effect in produce topic. In some cases you can use "Occasion" instead a verb "Effect", when it comes to topics like start, provoke.
Occasion
Occasion verb - To be the cause of (a situation, action, or state of mind).
Usage example: the announcement concerning the change in scheduling occasioned much confusion
Effect is a synonym for occasion in cause topic. You can use "Effect" instead a verb "Occasion", if it concerns topics such as activity, produce, start, bring about.
Mutual synonyms
How words are described
Both words in one sentence
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Changing one tag on one entry in the raws files in Dwarf Fortress causes fired crossbow bolts to produce this effect on occasion.
Source: Blown Across the Room -
In the manga, Yuki has a similar effect; on occasion, he's displayed something like the Rat's eyes, where his eyes lighten and his pupils disappear altogether.
Source: Hellish Pupils -
However, the stock sound effect ended with the bus skidding and crashing, which it actually does on one occasion where the faders are brought down too slowly.
Source: Special Effect Failure
Cite this Source
Occasion and Effect. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/effect/occasion
Effect & Occasion. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/effect/occasion>.
Occasion or Effect. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/effect/occasion.
Google Ngram Viewer shows how "effect" and "occasion" have occurred on timeline