COVETOUSNESS IS.  In Scripture, epithumeo (ἐπιθυμέω) can be strong desire for food, knowledge, sex, holy things, Godly ambition, and even a description of Jesus' own desire to break bread with His disciples on the night on which He was betrayed.  When He said it is adulterous (in the heart) to look on a woman (the word indicates a MARRIED WOMAN) with strong desire, He wasn't condemning the natural desire (which is morally neutral) but the illicit object (another man's wife, or by extension a whore or some other illicit object).  Christians have made a terrible mistake by demonizing the male libido as though it were inherently sinful. 

Strong's #1937: epithumeo (pronounced ep-ee-thoo-meh'-o)

Usage:

This word is used 16 times:
Matthew 5:28: "whosoever looketh on a woman to lust after her hath committed adultery with her already"
Matthew 13:17: "prophets and righteous men have desired to see those things which ye see, and"
Luke 15:16: "And he would fain have filled his belly with the husks"
Luke 16:21: "And desiring to be fed with the crumbs which fell from"
Luke 17:22: "The days will come, when ye shall desire to see one of the days"
Luke 22:15: "unto them, With desire I have desired to eat this passover with"
Acts 20:33: " I have coveted no man's silver, or gold, or apparel."
Romans 7:7: "the law had said, Thou shalt not covet."
Romans 13:9: "Thou shalt not bear false witness, Thou shalt not covet; and if there be any other commandment,"
1 Corinthians 10:6: "should not lust after evil things, as they also lusted."
Galatians 5:17: "For the flesh lusteth against the Spirit, and"
1 Timothy 3:1: "If a man desire the office of a bishop, he desireth a good work."
Hebrews 6:11: "And we desire that every one of you do show the same diligence"
James 4:2: " Ye lust, and have not: ye kill, and desire to have, and"
1 Peter 1:12: "heaven; which things the angels desire to look into."
Revelation 9:6: "find it; and shall desire to die, and death shall flee"