core vs nuclear reactor

core and nuclear reactor both are nouns.

Word	Noun	Adjective	Verb	Adverb
core	Yes	No	Yes	No
nuclear reactor	Yes	No	No	No

core (noun)	nuclear reactor (noun)
a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil	(physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements
the chamber of a nuclear reactor containing the fissile material where the reaction takes place
(computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories
the choicest or most essential or most vital part of some idea or experience
the central meaning or theme of a speech or literary work
a small group of indispensable persons or things
the center of an object
the central part of the Earth
a cylindrical sample of soil or rock obtained with a hollow drill

core (verb)	nuclear reactor (verb)
remove the core or center from