maximum

[1]	most , upper limit , utmost , uttermost , greatest , peak , extreme , extremity , pinnacle , top , highest , (upper) limit
[2]	zenith , utmost , uttermost , pinnacle , peak , level best , limit , apex , acme , apogee , climax , crest , high(est) point , top , summit

adj.

[1]	maximal , greatest , most , utmost , uttermost , superlative , supreme , paramount , extreme , highest , top , topmost , climactic , crowning
[2]	maximal