Final answer:
Roget's Thesaurus is the best source for synonyms of the word fascinate.
Step-by-step explanation:
The best source of synonyms for the word fascinate would be G Roget's Thesaurus. A thesaurus is a reference book that lists words and their synonyms, which are words that have the same or similar meanings. Roget's Thesaurus is a widely recognized and comprehensive thesaurus that can provide a wide range of synonyms for the word fascinate.
Learn more about selecting the best source for synonyms