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To ascertain means to find out or learn something with certainty.

words with similar pronunciation

The similarity is measured in the number of changed sounds (added, deleted, or replaced) between two transcriptions.

stain/stˈɛɪn/, 2 changes.
pertain/pɚtˈɛɪn/, 2 changes.
entertain/ˌɛntɚtˈɛɪn/, 3 changes.
strain/stɹˈɛɪn/, 3 changes.
overturn/ˈoʊvɚtˌɝn/, 3 changes.
sustain/səstˈɛɪn/, 3 changes.
detain/dɪtˈɛɪn/, 3 changes.
staid/stˈɛɪd/, 3 changes.
overtone/ˈoʊvɚtˌoʊn/, 3 changes.
stay/stˈɛɪ/, 3 changes.

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