Kley

Keen

Recorded as a feminine given name in Khakas

Kilo

English (American) given name; also a metric prefix denoting a factor of 10^3

Kole

A variant of 'coal' or 'black'.

Kool

A slang term meaning cool or awesome

Agil

Recorded as a masculine given name in Azerbaijani

Apex

English word for the top or highest point of something

Arty

From Art with the -y suffix

Ashy

Blue

From the English word for the colour, via Norman French from a Frankish word

Burl

A knotty growth on a tree trunk or branch