We have put together a list of words that are similar to MAINLAND.

3 Alternative Words Similar to mainland

1 Earth Noun      Synonym Words Like Earth
2 Ground Noun      Synonym Words Like Ground
3 Land Noun      Synonym Words Like Land

4 definitions of mainland

1 The continent; the principal land, as distinguished from islands.
2 The principal island of a group: as, the mainland of Orkney.
3 The main landmass of a country or continent
4 the main land mass of a country or continent; as distinguished from an island or peninsula
We get our data from many different dictionaries across the web:
Wordnik, Wiktionary, Century, American Heritage, Gcide