Commiserate as a verb is to feel or express compassion or sympathy (for someone) while Sympathise as a verb is to have, show or express sympathy; to be affected by feelings similar to those of another, in consequence of knowing the person to be thus affected.
Part of speech: verb
Definition: to feel or express compassion or sympathy (for someone)
Part of speech: verb
Definition: To have, show or express sympathy; to be affected by feelings similar to those of another, in consequence of knowing the person to be thus affected.
We hope you now know whether to use Commiserate or Sympathise in your sentence.