Synonyms of core in English:

core


See definition of core

noun

1‘they plan to harness the heat from the earth's core’

SYNONYMS
centre, interior, middle, nucleus, bosom
recesses, bowels, depths
informal innards
literary midst

2‘this new paper goes to the core of the argument’

SYNONYMS
heart, nucleus, nub, hub, kernel, marrow, meat
essence, quintessence, crux, gist, pith, substance, sum and substance, body, basis
bedrock, cornerstone, linchpin, mainspring, foundation, root, base, underpinning
fundamentals, essentials, basic principles, main ingredients
heart of the matter
informal nitty-gritty, brass tacks, nuts and bolts, ABC, basics

adjective

1‘the core issue here is that of urban poverty’

SYNONYMS
central, key, basic, fundamental, elemental, principal, primary, main, chief, crucial, vital, essential
informal number-one
ANTONYMS

peripheral, minor