Synonyms for Amplification:

n.

hike, upturn, jump, swell, boost, raise, escalation, aggrandizement, multiplication, upsurge, rise, buildup, proliferation, upswing, augment. act (noun)
elaboration.
addition (noun)
intensification.
amplification (noun)
gain, elaboration.
attribute (noun)
gain.
augmentation (noun)
intensification.
duplication (noun)
multiplication.
expansion (noun)
expansion, swelling, thickening, growth, magnification, burgeoning, inflation, fattening, increment, enlargement, crescendo, engorgement, increase, extension, stretching, spreading, widening, dilation, lengthening, augmentation, distension, development, broadening.
increase (noun)
aggrandizement.
increase in size or effect (noun)
elaboration, expansion, extension, buildup, development, magnification, stretching, boost, augmentation, widening, lengthening, intensification, enlargement.

Other synonyms:

aggrandizement. upswing, upturn, escalation. proliferation, buildup. Other relevant words:
gain, rise, buildup, intensification, augment, elaboration, upturn, multiplication, swell, raise, proliferation, augmentation, upswing, aggrandizement, boost, escalation, jump, upsurge, hike.

Usage examples for amplification

  1. While there can be no reasonable doubt either that the Christian churches from the very beginning were in possession of a definite and formulated symbol, or that this symbol was an amplification of the trinitarian formula of Baptism, yet we are unable to ascertain with any degree of certainty what its exact original wording was. – Historical Introductions to the Symbolical Books of the Evangelical Lutheran Church by Friedrich Bente
  2. Enough of illustrative examples have now been given, it is thought, to enable observers to thoroughly comprehend the scope of the proposed final volume on the mortuary customs of North American Indians, and while much more might have been added from the stored- up material on hand, it has not been deemed advisable at this time to yield to a desire for amplification – A further contribution to the study of the mortuary customs of the North American Indians First Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1879-80, Government Printing Office, Washington, 1881, pages 87-204 by H. C. Yarrow
  3. Also called cascade amplification – The Radio Amateur's Hand Book by A. Frederick Collins