Find Synonyms

infiltration Synonyms

Another word for infiltration

Choosing another word for infiltration depends on context, so the 10 synonyms and similar words below are separated across 3 exact definitions and ranked by match strength.
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• noun (Context 1)

The action of entering or gaining access to an organization, place, or system surreptitiously and gradually, especially in order to acquire secret information or cause damage from within.

Usage Example

"The cybersecurity audit revealed a sophisticated penetration of the company's internal network that had gone undetected for months."

Strongest
penetration
Strong
intrusion
incursion
invasion

• noun (Context 2)

The process by which water or another liquid slowly permeates or passes into a porous substance, such as soil or rock.

Usage Example

"Heavy clay soils have a low rate of water seepage, which often leads to surface runoff during intense rainstorms."

Strongest
seepage
permeation
Strong
percolation
absorption

• noun (Context 3)

The abnormal diffusion or accumulation of fluid, cells, or other substances within a bodily tissue or organ, or the injection of a local anesthetic directly into tissues.

Usage Example

"The biopsy confirmed lymphocyte diffusion in the affected tissue, while the minor procedure itself required only local anesthetic diffusion."

Strong
diffusion
infusion

Opposites of infiltration

The opposite of infiltration shifts depending on context. Common opposites include:

exfiltration
withdrawal
expulsion
See all opposites of infiltration

Cite this Entry


Wordmom. (2026). Synonyms for Infiltration. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/infiltration
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