THESAURUS
Septum
barrier, brattice, buffer, buffer state, bulkhead, bumper, cloison, collision mat, cushion, diaphragm, dissepiment, dividing line, dividing wall, division, fender, interseptum, mat, midriff, midsection, pad, panel, paries, partition, party wall, property line, separation, septulum, shock pad, wall
ROGET THESAURUS
Septum
Interposition
N
interposition, interjacence, intercurrence, intervenience, interlocation, interdigitation, interjection, interpolation, interlineation, interspersion, intercalation, interpenetration, permeation, infiltration, intervention, interference, intrusion, obtrusion, insinuation, insertion, dovetailing, embolism, intermediary, intermedium, go between, bodkin, intruder, interloper, parenthesis, episode, flyleaf, partition, septum, diaphragm, midriff, dissepiment, party wall, panel, room divider, halfway house, interjacent, intercurrent, intervenient, intervening, intermediate, intermediary, intercalary, interstitial, embolismal, parenthetical, episodic, mediterranean, intrusive, embosomed, merged, between, betwixt, twixt, among, amongst, amid, amidst, mid, midst, in the thick of, betwixt and between, sandwich-wise, parenthetically, obiter dictum.