velocious

high-speed

accelerated fast nonstop quick rapid swift

slow sluggish

imprecise indefinite indirect obscure uncertain vague

agile brisk hot nimble quick rapid swift

accelerated active dashing electric flashing fleet fleeting flying hurried racing ready snap split-second winged

PDQ blue streak breakneck double-time expeditious expeditive hairtrigger hasty hypersonic in a jiffy in nothing flat lickety split like a bat out of hell like all get out like crazy like mad on the double posthaste presto pronto screamin' snappy speedball supersonic

clumsy slow

dull

plodding tardy unhurried