Answer :
Thesaurus is the best choice for finding synonyms of the word core.
What is meant by synonymous?
Words, morphemes, or phrases that are synonyms mean exactly the same thing as another word or mean something quite similar to it. Examples of words that can be used to describe "happy" include "pleasant," "bright," and "satisfied."
We frequently come across references to antonyms when studying literacy synonyms.
The conveyance of ideas is improved when equivalent, possibly more precise terms are used in their place. Synonyms give your writing vitality and aid in giving the reader's mind a more captivating picture.
Thus, Thesaurus is the best choice.
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