Both subcontinent and galaxy are common nouns, Words for any subcontinent or any galaxy of any kind.
A proper noun is the name of a specific person, place, thing, or a title; for example:
- The Indian Subcontinent or the Arabian Subcontinent.
- Committee for the Arts of the Indian Subcontinent, San Diego, CA
- "Gothic Alaskan and Other Stories: Bad Horror from the Dark Subcontinent" by B.J. Shelby
- Great Andromeda Nebula, aka the Andromeda Galaxy
- Galaxy Street, Houston, TX or Galaxy Street, Victorville, CA
- Galaxy Diner, 9th Avenue, New York, NY
