Upmost

from WordNet (r) 3.0 (2006)

upmost
    adj 1: at or nearest to the top; "the uppermost book in the
           pile"; "on the topmost step" [syn: {topmost},
           {uppermost}, {upmost}]

from The Collaborative International Dictionary of English v.0.48

Upmost \Up"most`\, a. [Cf. {Uppermost}.]
   Highest; topmost; uppermost. --Spenser. Dryden.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

71 Moby Thesaurus words for "upmost":
      above, acmatic, acme, apex, apical, apogee, brow, cap, capital,
      chief, climax, cloud nine, consummate, crest, crown, culmen,
      culmination, edge, extreme limit, extremity, greater, head,
      headmost, heaven, heavens, height, high noon, higher, highest,
      highest pitch, highest point, limit, maximal, maximum, meridian,
      meridional, mountaintop, ne plus ultra, no place higher, noon,
      over, overmost, paramount, peak, pinnacle, pitch, point, pole,
      preeminent, ridge, seventh heaven, sky, spire, summit, summital,
      superior, supreme, tip, tip-top, top, topmost, ultimate, upper,
      upper extremity, uppermost, utmost, vertex, vertical, very top,
      zenith, zenithal