thesaurus is the answer!
thesuarus
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Typically, a thesaurus will have both synonyms and antonyms that you can look for.
Thesaurus.
thesaurus
Probably a thesaurus, but a dictionary may be some help!
Look it up!!!
Clever and wise are not exact synonyms, but they would only rarely be antonyms. They both have the underlying meaning of mental acuity, or smartness, although each has an inference of the type or source for this faculty.
Synonyms and antonyms are things that are similar or opposite. Synonyms of hot would be could be hot or balmy. Hot or balmy would mean something similar to hot. Antonyms of hot would be cold or chilly. Hot or chilly would mean something the opposite of hot.
Slow and leisurely would be synonyms.
A good website for synonyms and antonyms would be www.synonym.comOr you can type www.antonym.comOr you can type www.definition.com
A thesaurus specifically would typically provide lists of synonyms and antonyms for words, while a dictionary would focus on providing definitions, pronunciation, and word usage in addition to synonyms and antonyms.
Antonyms would have opposite meanings. Since huge and gigantic have very similar meanings they are synonyms.
A thesaurus would be the best reference source to find several synonyms for the word "sauntered." Thesauruses provide lists of synonyms and related words that can be used as alternatives in writing to avoid repetition.