Extended Strong's Greek Lexicon (Abbott-Smith based)
speed
Usage: τάχος, -ους, τό [in LXX chiefly for parts and derivatives of מָהַר ;] swiftness, speed. Adverbially, ἐν τ. (ταχέως), quickly, speedily, soon: Luk.18:8, Act.12:7 22:18 25:4, Rom.16:20, 1Ti.3:14, Rev.1:1 22:6.† (AS)