
1) Emp
Found on
https://www.crosswordclues.com/clue/hre

1) Baseball scoreboard letters 2) Box-score initials 3) Bygone european realm 4) Domain of Otto I, II, etc 5) Early 19th Century casualty 6) Former fed 7) Former power in Eur 8) Germany, Bohemia, Italy, etc 9) Initials from 800 AD 10) Initials from 962 11) Initials in old europe 12) Initials of 800 AD
Found on
https://www.crosswordclues.com/clue/hre

(from the article `Vietnam`) ...as the Rade (Rhade), Jarai, Chru, and Roglaispeak Austronesian languages, linking them to the Cham, Malay, and Indonesian peoples; ...
Found on
http://www.britannica.com/eb/a-z/h/76

here
Found on
http://www.noslang.com/dictionary/h/

acronym: Homogeneous Reactor Experiment (impoundment)
Found on
https://www.encyclo.co.uk/local/20002

Homogeneous Reactor Experiment
Found on
https://www.encyclo.co.uk/local/20785
No exact match found.