lac / lack / lakh [læk]
lac – n. – a resinous substance secreted by certain insects, used in the manufacture of shellac
lack – n. & v. – n. – 1. an insufficiency, shortage, or absence of something require or desired; 2. something that is required but is absent or in short supply; v. intr. – to be deficient (in) or have need (of)
lakh – n. – one hundred thousand – can also be used to express a large indefinite number