Ranked by relevance and common usage.
Keep "ascertaining" 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.
If two options seem close, choose the one that best matches the audience and purpose of the sentence.
Choose a synonym only if it keeps the core idea of "ascertaining" intact in the sentence you are editing.
Check whether the replacement sounds more formal, casual, emotional, technical, or forceful than the original word.
Read the full sentence after the swap. Keep the synonym only when the sentence becomes clearer or more precise.
Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
After choosing a replacement for "ascertaining", read the sentence once for meaning and once for rhythm. The best synonym should feel natural in the full sentence, not only accurate in a word list.
If the synonym makes the sentence slower, vaguer, or more dramatic than intended, keep "ascertaining" or choose a simpler alternative from the closest-match group.
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
Showing 16 of 21 words.
Showing 16 of 23 words.
3 total sentences available.
He had entertained hopes of being admitted to a sight of the young ladies, of whose beauty he had heard much; but he saw only the father. The ladies were somewhat more fortunate, for they had the advantage of ascertaining from an upper window that he wore a blue coat, and rode a black horse.
Source: tatoeba (837370)
So late as 1610, Galileo, a Florentine, discovered and introduced the use of telescopes, and by applying them to observe the motions and appearances of the heavenly bodies, afforded additional means for ascertaining the true structure of the universe.
Source: tatoeba (1530019)
During the reigns of Charles II., and James, his successor, the principal nobility held frequent meetings in a subterraneous vault beneath this house, for the purpose of ascertaining the measures necessary to be pursued for reestablishing the liberties of the kingdom, which the insidious hypocrisy of one monarch, and the more avowed despotism of the other, had completely undermined and destroyed.
Source: tatoeba (11668736)
Closest matches include ascertainment, check, confirm, confirmation, confirming.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.