pervasion

from WordNet (r) 3.0 (2006)

pervasion
    n 1: the process of permeating or infusing something with a
         substance [syn: {permeation}, {pervasion}, {suffusion}]

from The Collaborative International Dictionary of English v.0.48

Pervasion \Per*va"sion\ (p[~e]r*v[=a]"zh[u^]n), n. [L. pervasio.
   See {Pervade}.]
   The act of pervading, passing, or spreading through the whole
   extent of a thing. --Boyle.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

20 Moby Thesaurus words for "pervasion":
      decoction, diffusion, imbuement, impregnation, infiltration,
      infusion, instillation, instillment, interpenetration, marination,
      overrunning, overspreading, overswarming, penetration, permeation,
      saturation, soaking, steeping, suffusion, transfusion

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