
1) Antis 2) Enemies 3) Nemeses 4) Rivals
Found on
https://www.crosswordclues.com/clue/foes

1) GI Joe and Cobra Commander 2) Achilles and hector 3) Adversaries 4) Antagonists 5) Anti bodies 6) Arduin and Henry II 7) Batman and The Joker 8) Bitter enemies 9) Cassius and Casca, to Caesar 10) Certainly not friends 11) Church signal 12) Clashing partisans 13) Competitors 14) Contenders 15) Darius III and Alexander
Found on
https://www.crosswordclues.com/clue/foes

The maximum ORDINARY MODE radiowave frequency capable of reflec- tion from the SPORADIC E REGION of the IONOSPHERE.
Found on
http://www.encyclo.co.uk/visitor-contributions.php
No exact match found.