Noun

• S: (n) core, nucleus, core group (a small group of indispensable persons or things) "five periodicals make up the core of their publishing program"
• S: (n) core (the center of an object) "the ball has a titanium core"
• S: (n) core (the central part of the Earth)
• S: (n) kernel, substance, core, center, centre, essence, gist, heart, heart and soul, inwardness, marrow, meat, nub, pith, sum, nitty-gritty (the choicest or most essential or most vital part of some idea or experience) "the gist of the prosecutor's argument"; "the heart and soul of the Republican Party"; "the nub of the story"
• S: (n) core (a cylindrical sample of soil or rock obtained with a hollow drill)
• S: (n) Congress of Racial Equality, CORE (an organization founded by James Leonard Farmer in 1942 to work for racial equality)
• S: (n) effect, essence, burden, core, gist (the central meaning or theme of a speech or literary work)
• S: (n) core, magnetic core ((computer science) a tiny ferrite toroid formerly used in a random access memory to store one bit of data; now superseded by semiconductor memories) "each core has three wires passing through it, providing the means to select and detect the contents of each bit"
• domain category
• direct hypernym / inherited hypernym / sister term
• part holonym
• S: (n) core (the chamber of a nuclear reactor containing the fissile material where the reaction takes place)
• S: (n) core (a bar of magnetic material (as soft iron) that passes through a coil and serves to increase the inductance of the coil)

Verb

• S: (v) core (remove the core or center from) "core an apple"