144 entries under noun topic. ×

12
penetration(act, attack, push, transport)
11
invasion(attack, assault, flood, plague)
9
percolation
9
permeation(transport, flood, employment, passage)
9
incursion(attack, raid, military, mission)
7
inroad(attack, raid, military, mission)
7
intrusion(ingress, insertion)
6
infusion(mixture, passage)
6
insertion(entrance, saturation, diffusion, seepage)
6
insinuation(ingress, insertion)
6
seepage(waste, entrance, saturation, diffusion)
5
entrance(saturation, diffusion, seepage, ingress)
5
import
5
ingress(passage, entrance, saturation, diffusion)
5
irruption(attack, raid, military, mission)
5
leakage
5
piercing(adjective, stab, entrance, saturation)
4
assault(attack, raid, military, mission)
4
attack(raid, military, mission)
4
sortie(attack, raid, military, mission)
<12345…8>
11 years ago|4.4k views|share |citing 
APASmart Define. (2015). infiltration thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/infiltration/thesaurus/synonyms
ChicagoSmart Define. 2015. "infiltration thesaurus" https://smartdefine.org/infiltration/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, infiltration thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/infiltration/thesaurus/synonyms>.
MLASmart Define. "infiltration thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/infiltration/thesaurus/synonyms>