pride of place;  most prominent;  top-ranking
 masterwork;  masterpiece;  crowning work;  one's magnum opus;  work of the highest quality
 person of paramount authority;  supreme wielder of power
 senior leadership;  senior leader;  upper echelon (of power);  top-ranking officer
 highest ever;  record-high;  highest on record
 record high;  all-time high
 highest score;  highest number of points;  top grade;  peak altitude;  highest point
 best (highest) record;  new record
 supreme leader;  ultimate leader
 maximum temperature;  highest temperature;  (today's) high
 highest institute of education
 supreme council;  high council;  Supreme Soviet (former USSR)
 largest amount of money;  maximum amount of money
 highest level;  high-water mark
 oldest;  most advanced age
 (the) best of one's life;  lifetime ...
 chief executive officer;  CEO
 chief executive officer;  CEO
 highest price;  price ceiling
 maximum punishment;  maximum sentence
 supreme law (of the land)
 chief operating officer;  COO
 Supreme Court of Judicature (Scotland);  High Court (England);  Parlement (France)
 chief financial officer;  CFO
 General Headquarters (office of the Supreme Commander of the Allied Powers);  GHQ
 General Headquarters (office of the Supreme Commander of the Allied Powers);  GHQ
 Supreme Commander for the Allied Powers (in Japan);  SCAP
 magnum opus;  (one's) best work
 Supreme Public Prosecutor's Office
 tournament win in the highest division
 highest honorifics;  honorific language mainly reserved for speaking of or to a member of the Imperial family