SG Heritage Dictionary

Middle Roget’s Thesaurus §68

N. middle, midst, mediety|, mean, medium, middle term, center, mid-course, mezzo termine, juste milieu, halfway house, nave, navel, omphalos, nucleus, nucleolus, equidistance, bisection, half distance, equator, diaphragm, midriff, intermediate

Adj. middle, medial, mesial, mean, mid, median, average, middlemost, midmost, mediate, intermediate, equidistant, central, mediterranean, equatorial, homocentric

Adv. in the middle, midway, halfway, midships, amidships, in medias res

Centrality Roget’s Thesaurus §222

N. centrality, centricalness, center, # middle, focus, core, kernel, nucleus, nucleolus, heart, pole axis, bull's eye, nave, navel, umbilicus, backbone, marrow, pith, vertebra, vertebral column, hotbed, concentration, centralization, symmetry, center of gravity, center of pressure, center of percussion, center of oscillation, center of buoyancy &c, metacenter

V. be central, converge, render central, centralize, concentrate, bring to a focus

Adj. central, centrical, middle, azygous, axial, focal, umbilical, concentric, middlemost, rachidian, spinal, vertebral

Adv. middle, midst, centrally