penetration (n.)
- access
- acuity
- acumen
- acupuncture
- acuteness
- admission
- apperception
- astuteness
- bore
- boring
- broach
- cleverness
- cogency
- decoction
- diffusion
- discernment
- discrimination
- entrance
- entree
- entry
- farsightedness
- fixing
- flair
- foresight
- foresightedness
- goring
- graft
- grafting
- impaction
- impalement
- implantation
- import
- importation
- importing
- impregnation
- incision
- incisiveness
- income
- incoming
- infiltration
- infusion
- ingress
- injection
- inoculation
- input
- inroad
- insertion
- insight
- insinuation
- instillation
- instillment
- intake
- intelligence
- interjection
- interpenetration
- interpolation
- introduction
- intromission
- intrusion
- judgment
- keenness
- lancing
- leakage
- longsightedness
- perception
- perceptiveness
- percolation
- perforation
- perfusion
- permeation
- perspicaciousness
- perspicacity
- perspicuity
- perspicuousness
- pervasion
- pricking
- providence
- puncture
- quick-wittedness
- reception
- sagaciousness
- sagacity
- saturation
- seepage
- sensibility
- sensitivity
- sentience
- shrewdness
- soaking
- suffusion
- tessellation
- transfusion
- transplant
- transplantation
- trenchancy
- understanding
- wit