ROGET THESAURUS
superadd
Increase
VB
increase, augment, add to, enlarge, dilate, grow, wax, get ahead, gain strength, advance, run up, shoot up, rise, ascend, sprout, aggrandize, raise, exalt, deepen, heighten, strengthen, intensify, enhance, magnify, redouble, aggravate, exaggerate, exasperate, exacerbate, add fuel to the flame, oleum addere camino,
superadd, spread.
Addition
VB
add, annex, affix,
superadd, subjoin, superpose, clap on, saddle on, tack to, append, tag, ingraft, saddle with, sprinkle, introduce, insert, become added, accrue, advene, supervene, reinforce, reenforce, restrengthen, swell the ranks of, augment.