Synonyms of gravamen

1 Syllable

nub, soul, stuff, pith, meat, core, hub, crux, quick, root, seat, gist

2 Syllables

spirit, bosom, focus, middle, nucleus, basic, kernel, marrow, center

3 Syllables

polestar, essence, substance

4 Syllables

fuselage, nitty-gritty, quintessence