Synonyms for Increment:

n.

leap, spurt, surge, upswing, upsurge, explosion. rise, jump, hike. accretion (noun)
supplement, profit.
addition (noun)
accumulation, aggregation, augmentation, acquisition, attainment, expansion, enlargement, addition, increase, accrual.
attribute (noun)
increase.
expansion (noun)
stretching, crescendo, dilation, thickening, fattening, spreading, development, distension, burgeoning, lengthening, amplification, widening, engorgement, broadening, swelling.
increase (noun)
extension, growth, inflation, multiplication, magnification, elevation.
increment (noun)
increase, growth.
mathematics (noun)
calculus, subtrahend, antilogarithm, numerator, dividend, algorithm, denominator, reciprocal, power, multiplicand, root, minuend, arithmetic, cube, square root, radix, algebra, index, differential calculus, modulus, cube root, geometry, coefficient, multiple, multiplier, factor, logarithm, fraction, integral, formula, quotient, trigonometry, Multiplicator, quadratics, divisor, exponent.
process (noun)
increase, growth.
small step toward gain (noun)
accrual, augmentation, supplement, increase, profit, rise, raise, enlargement, addition.

v.

add (verb)
accumulate, total, accrue, annex, aggregate, add, tally, attain, augment, acquire, sum.
expand (verb)
dilate, thicken, swell, spread, stretch, develop, engorge, distend.
increase (verb)
boost, magnify, fatten, heighten, extend, expand, elevate, lengthen, widen, multiply, upgrade, advance, inflate, maximize, burgeon, reinforce, broaden, amplify, grow, raise, enlarge.

Other synonyms:

Other relevant words:
hike, upswing, explosion, rise, profit, leap, upsurge, spurt, supplement, jump, surge.