Suddenly, and at the same moment, the ebullition ceased, and the compound changed to a dark purple, which faded again more slowly to a watery green.
Source: wiktionary
Ranked by relevance and common usage.
Keep "ebullition" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
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7 total sentences available.
Suddenly, and at the same moment, the ebullition ceased, and the compound changed to a dark purple, which faded again more slowly to a watery green.
Source: wiktionary
His threats—his severe exclamations were but ebullitions of keen vexation, of agony of mind.
Source: wiktionary
Having vented the first ebullition of his wrath, he despatched a message demanding the surrender of the corporal […].
Source: wiktionary
I don't think poor Amelia cared anything about Brienne and Montmirail, or was fairly interested in the war until the abdication of the Emperor; when she clapped her hands and said prayers—oh, how grateful! and flung herself into George Osborne's arms with all her soul, to the astonishment of everybody who witnessed that ebullition of sentiment.
Source: wiktionary
Showing 4 of 7 available sentences.
Closest matches include outburst, ado, agitation, blowup, bluster.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.