pol·y·im·ide 
(pŏl′ē-ĭmīd′)
(pŏl′ē-ĭmīd′)n.
A synthetic polymer, containing repeating imide groups, that is resistant to high temperatures, wear, and corrosion, used primarily as a coating or film.
- knocker
- knock for a loop
- knock it off
- knock-knee
- knock-kneed
- knock off
- knockoff
- knock out
- knockout
- knock out of the box
- knock socks off
- knock (someone's) socks off
- knock someone's socks off
- knock some sense into
- knock/throw for a loop
- knock together
- knock up
- knockwurst
- knockwurst
- knoll
- knoll
- knop
- Knossos
- knot
- knot