To look up the synonyms of a word....
A Thesaurus is used to find synonyms (words with similar meanings) and antonyms (words with opposite meanings) for a particular word. It helps writers improve their vocabulary, avoid repetitive language, and choose the most appropriate words when expressing ideas.
I would suggest the thesaurus or dictonary.com.
You would use a thesaurus.
Roget's Thesaurus Roget's Thesaurus
You could research "walk" in a thesaurus and then use past tense to create synonyms for "walked." You may actually find "walked" in a thesaurus.
A synonym would be frequent. An antonym would be rare.
A dictionary or thesaurus
A thesaurus would be the ideal reference source to find synonyms for the word "angry."
Probably a thesaurus, but a dictionary may be some help!
A dictionary of synonyms is called a thesaurus.
A thesaurus or a dictionary
to find a more descriptive word
A thesaurus would be the best reference to find another word for "famished". You can also use online thesaurus tools to quickly find synonyms for any word.