Googles take is huge so I picked a small biblical version if any of you are interested although it doesn't address the difference that saber has pointed.:
Dictionaries - Baker's Evangelical Dictionary of Biblical Theology - Lust
Lust [N] [E]
A strong craving or desire, often of a sexual nature. Though used relatively infrequently (twenty-nine times) in Scripture, a common theme can be seen running through its occurrences. The word is never used in a positive context; rather, it is always seen in a negative light, relating primarily either to a strong desire for sexual immorality or idolatrous worship. In secular literature, the word indicates only a strong desire and can carry either good or bad connotations. The Greek word epithymia [ejpiqumiva] and the Hebrew words awah [h"w'a] and hamad [d;m'j] can themselves be used in a neutral or good sense (i.e., Matt 13:17 ). In these instances the New International Version does not translate the word as "lust." Rather, it is translated as "desire, " "longing, " and the like. The context surrounding the word lends to this translation in such instances. However, in Scripture, as translated in the New International Version, the word is used for a strong desire that is negative and forbidden. Indeed, the unregenerate are governed and controlled by deceitful lusts or desires ( Eph 2:3 ; 4:22 ; Col 3:5 ; Titus 2:12 ).
In the New Testament, the word moves from referring primarily to idolatry to referring instead almost exclusively to sexual immorality. While the idea of idolatry is not completely absent, the primary intention is as a strong, inordinate desire for sexual relations. This sexual immorality, however, is not intended to represent actions alone since lust occurs first as a thought in the mind. The warning is to stop the lust before it moves into the realm of action. For instance, Jesus commands that a man is not to even look at a woman lustfully (i.e., with a desire to have sexual relations with her) because that is the same as committing the physical act of adultery ( Matt 5:27-30 ); both are sin.
In each of the texts where Paul uses the word, it clearly is condemnatory of sexual immorality, both homosexual ( Rom 1:26-27 ) and heterosexual. The command from Paul is to utterly destroy those inordinate desires that most often manifest themselves in the area of sexuality (cf. Col 3:5 ). Paul continues to warn that we must learn to control our bodies and be sanctified rather than giving in to our base desires, which is characteristic of those who do not know God (cf. 1 Thess 4:3-5 ).