Behindhand
Part of speech: adjective
Definition: late, tardy, overdue in debt, or in arrears
Part of speech: adverb
Definition: belatedly, tardily in debt, or in arrears
Unpunctual
Part of speech: adjective
Definition: Not punctual.
Behindhand as an adjective is late, tardy, overdue while Unpunctual as an adjective is not punctual.
Part of speech: adjective
Definition: late, tardy, overdue in debt, or in arrears
Part of speech: adverb
Definition: belatedly, tardily in debt, or in arrears
Part of speech: adjective
Definition: Not punctual.
We hope you now know whether to use Behindhand or Unpunctual in your sentence.