use vs economic science

use and economic science both are nouns.

Word	Noun	Adjective	Verb	Adverb
use	Yes	No	Yes	No
economic science	Yes	No	No	No

use (noun)	economic science (noun)
the act of using	the branch of social science that deals with the production and distribution and consumption of goods and services and their management
(psychology) an automatic pattern of behavior in reaction to a specific situation; may be inherited or acquired through frequent repetition
exerting shrewd or devious influence especially for one's own advantage
what something is used for
a particular service
(law) the exercise of the legal right to enjoy the benefits of owning property
(economics) the utilization of economic goods to satisfy needs or in manufacturing

use (verb)	economic science (verb)
put into service; make work or employ for a particular purpose or for its inherent or natural purpose
take or consume (regularly or habitually)
use up (resources or materials)
habitually do something or be in a certain state or place (use only in the past tense)
avail oneself to
seek or achieve an end by using to one's advantage