tardy (n.)
tardy (adj.)
- anachronistic
 - back
 - backward
 - beforehand
 - behind
 - behindhand
 - belated
 - blocked
 - checked
 - dated
 - delayed
 - dilatory
 - early
 - impeded
 - indolent
 - jammed
 - lackadaisical
 - languid
 - late
 - latish
 - lethargic
 - listless
 - obstructed
 - overdue
 - phlegmatic
 - reluctant
 - retarded
 - slack
 - slothful
 - slow
 - sluggish
 - stopped
 - unpunctual
 - unready
 - unseasonable
 - untimely
 
Too swift arrives as tardy as too slow.