Republic of India vs subcontinent

Republic of India and subcontinent both are nouns.

Word	Noun	Adjective	Verb	Adverb
Republic of India	Yes	No	No	No
subcontinent	Yes	No	No	No

Republic of India (noun)	subcontinent (noun)
a republic in the Asian subcontinent in southern Asia; second most populous country in the world; achieved independence from the United Kingdom in 1947	a large and distinctive landmass (as India or Greenland) that is a distinct part of some continent