knot·hole 
(nŏthōl′)
(nŏthōl′)n.
A hole in a piece of lumber where a knot has dropped out or been removed.
- interethnically
- interface
- interfacial
- interfacing
- interfaith
- interfere
- interference
- interference pattern
- interferential
- interferer
- interferingly
- interferometer
- interferometric
- interferometrically
- interferometry
- interferon
- interferon alpha
- interferon beta
- interferon gamma
- interfertile
- interfertility
- interfluve
- interfluvial
- intergalactic
- intergalactically