
1) Constant 2) Determined 3) Dogged 4) Energetic 5) Ever energetic 6) Having endless energy 7) Indefatigable 8) Indefatigable, unflagging 9) Like a junkyard car 10) Like many a junkyard car 11) Patient 12) Persistent 13) Steady 14) Unflagging 15) Unwearying
Found on
https://www.crosswordclues.com/clue/tireless

1) Diligent 2) Energetic 3) Hardworking 4) Indefatigable 5) Indefatigably 6) Industrious 7) Unflagging 8) Untiring 9) Unwearying
Found on
https://www.crosswordclues.com/clue/tireless

• (a.) Untiring.Tireless synonymsIndefatigable, Industrious,
Found on
http://thinkexist.com/dictionary/meaning/tireless/
Tire'less adjective Untiring.
Found on
http://www.encyclo.co.uk/webster/T/61

HMS Tireless is a British Trafalgar Class fleet submarine of 5208 tons displacement dived launched in 1984. HMS Tireless is powered by a pressurised water-cooled PWR 1 nuclear reactor with two Paxman auxiliary diesel engines, providing a top speed of 32 knots dived. HMS Tireless carries a crew of 97 including 12 officers and is armed with McDonnell...
Found on
http://www.probertencyclopaedia.com/browse/RT.HTM
No exact match found.