Answer:
rapidly is synonym of tumultuously
running is synonym of coursing
empty is synonym of vacant
Thin is synonym of slender
Explanation:
Synonym: Two or more words (of the same language) are synonyms of each other if they mean exactly or nearly the same. In some cases we may substitute a word with it synonym, but in many cases if words or phrases are substituted with their synonyms, the original meaning and/or beauty of the text may change.
Antonyms: Two or more words (of the same language) are antonyms of each other if they mean almost or completely opposite to each other.
