- chose the farthest seat from the door.
- don't go beyond the farthermost (or furthermost) tree.
- explored the furthest reaches of space.
- furthest removed from reality.
- had traveled to the farthest frontier.
- he swam the furthest.
- see who could jump the farthest.
- she goes farthest in helping us.
- the utmost tip of the peninsula.
- went the furthest of all the children in her education.