Synonyms of 'farther'
Farther, farthest, further, and furthest can all be used to refer to literal distance, but further and furthest are used for figurative senses denoting greater or additional amount, time, etc: further to my letter. Further and furthest are also preferred for figurative distance.
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Thesaurus for farther from the Collins English Thesaurus
Farther is a comparative form of → far .