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cornerstone
noun
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How to pronounce cornerstone:

Definition of cornerstone:

cornerstone (noun):
an indispensable part or basis
such a stone laid at a formal ceremony
a stone forming a part of a corner or angle in a wall
the fundamental assumptions from which something is begun or developed or calculated or explained.

Synonyms for cornerstone:

assumption
base
basis
bedrock
core
explanation
foundation
framework
fundament
ground
groundwork
justification
key
keystone
meat and potatoes
premise
root
starting point
support
supposal
supposition
theory
underpinning

Antonyms for cornerstone:

addendum
addition
afterthought
extra
postscript
sidenote
Other 3-syllable words

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Syllable Fun Fact
The English language exhibits a phenomenon called 'schwa deletion', where unstressed syllables are often pronounced as a quick, neutral vowel sound or omitted.

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