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foolproof

How to pronounce foolproof:

Synonyms for foolproof:

certain
flawless
infallible
perfect
reliable
sure
unerring
unfailing

Antonyms for foolproof:

doubtful
dubious
flawed
loose
open
penetrable
permeable
possible
questionable
refutable
risky
uncertain
unclosed
unsealed
Other 2-syllable words

Here are some other common 2-syllable words.

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Syllable Fun Fact
Consonant clusters can appear in the onset or coda of a syllable, but their composition is often restricted by language-specific rules.

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