SPRINTER is a good word, though Sprinting Achilles could not be recommended.
BRATTLE
A correspondent from Newcastle writes advocating the recognition of the word brattle as descriptive of thunder. It is a good old echo-word used by Dunbar and Douglas and Burns and by modern English writers. It is familiar through the first stanza of Burns's poem 'To a Mouse'.
Wee sleekit cow'rin tim'rous beastie,
O what a panic's in thy breastie.
Thou need na start awa sae hasty
Wi' bickering brattle....
which is not suggestive of thunder. The N.E.D. explains this as 'to run with brattling feet, to scamper'.
In Burns's 'A Winter Night', it is the noisy confusion of biting Boreas in the bare trees and bushes: