Difference between Sightseer and Excursionist

What is the difference between Sightseer and Excursionist?

Sightseer as a noun is one who goes sightseeing; one who goes around to look at sights or see things of interest; a tourist. while Excursionist as a noun is a person who goes on excursions; a traveller or tourist

We hope you now know whether to use Sightseer or Excursionist in your sentence.