3 Old HSK word(s): ☊孔 ** B ☊面孔 ** C ☊孔雀 ** D
鼻孔* * 穿孔* * 多孔* * 汗毛孔* * 毛孔* * 瞳孔* * 钻孔* *

Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.

钻 drill, bore / pierce / diamond
孔 opening, hole, orifice / great

Hsk Characters: 孔 *
HSK -Characters and beyond:
GbBig5EngRadMegaTripleMultilingual
孔 5B54 + 孔 + + opening, hole, orifice / great 子 孔 Child 孔 (C_L-ÄHNLICH) kong3 +

Korean:

孔 + 孔 구멍 공 (구멍, 굴) or 성 공 (?)
1 NHSK word(s): 孔* 6 kong3aperture/ opening/ hole
KOREAN6000 word(s):
0 KOREAN 2500 New HSK words):
0 KOREAN Sentence(s):