capital vs seed money

capital and seed money both are nouns.

Word	Noun	Adjective	Verb	Adverb
capital	Yes	Yes	No	No
seed money	Yes	No	No	No

As nouns, seed money is a hyponym of capital; that is, seed money is a word with a more specific, narrower meaning than capital:

capital (noun)	seed money (noun)
the upper part of a column that supports the entablature	capital needed to set up a new business or enterprise
one of the large alphabetic characters used as the first letter in writing or printing proper names and sometimes for emphasis
a seat of government
a center that is associated more than any other with some activity or product
wealth in the form of money or property owned by a person or business and human resources of economic value
assets available for use in the production of further assets