"uttermost" in the noun sense
1. utmost, uttermost, maximum, level best
the greatest possible degree
"he tried his utmost"
"uttermost" in the adjective sense
1. extreme, utmost, uttermost
of the greatest possible degree or extent or intensity
"extreme cold"
"extreme caution"
"extreme pleasure"
"utmost contempt"
"to the utmost degree"
"in the uttermost distress"
2. farthermost, farthest, furthermost, furthest, utmost, uttermost
comparatives of `far') most remote in space or time or order
"had traveled to the farthest frontier"
"don't go beyond the farthermost (or furthermost) tree"
"explored the furthest reaches of space"
"the utmost tip of the peninsula"
Source: WordNet® (An amazing lexical database of English)
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