(literary) they

side by side / concurrent / parallel

go side by side / be concurrent

going side by side / being concurrent / (uncommon) being parallel

to run; to move at a high speed / to appear briefly; to flash / to give over oneself to; to commit oneself to (usually something bad) / (music) Alternative spelling of ハシる

run

race; run

parallel import

those (referring to things distant from the speaker)

the 走 radical, e.g. 起