What's the difference between a regular sin and an "abomination"?

The dictionary defines an abomination as something worthy of extreme disgust or hatred.
God defines an abomination as all that do unrighteously (Deuteronomy 25:16).
“Sin has an exclusively religious connotation, referring to any act specifically proscribed by religious doctrine.” 
“Abominable is closer in tone to abhorrent and loathsome in stressing that something merits severe condemnation and hatred.” So an abomination is a sin that “merits severe condemnation and hatred.” 
Proverb 6:16-19 of the Holy Bible, King James Version, states: “These six things doth the LORD hate; yea, seven are an abomination unto him: a proud look, a lying tongue, and hands that shed innocent blood, a heart that deviseth wicked imaginations, feet that be swift in running to mischief, a false witness that speaketh lies, and he that soweth discord among brethren.” The seven are all sins but at the same time, are abominations to God.
Abomination is also used for sin in general (Isaiah 66:3); or an idol (Isaiah 44:19); or adultery (Ezekiel 22:11). 
Proverbs 6:16 - 18 lists six things which are also abominations: "haughty eyes, a lying tongue, hands that shed innocent blood, a heart that devises wicked schemes, feet that are swift in running to mischief." 
The word "abomination" is also used in Jewish (and Christian Old Testament) scriptures to refer to homosexual activity (Leviticus 18:22), Leviticus 20:13), idolatry (Deuteronomy 7:25, Deuteronomy 13), cross-dressing (Deuteronomy 22:5), cheating in the market by using rigged weights (Deuteronomy 25:13-19, Proverbs 11:1), and dishonesty (Proverbs 12:22). 
It is also used for eating seafood that lacks fins and scales (Levitius 11:11), eating certain birds of prey, including bats (Leviticus 11:12) and all insects (Leviticus 11:23 and 11:41) and other biblically unclean animals (Leviticus 20:25); remarrying the person one previously divorced (Deutoronomy 24:4); telling lies (Proverbs 12:22); being proud in heart (Proverbs 16:5); justifying the wicked (Proverbs 17:15); and cheating in business (Proverbs 20:10 and Proverbs 20:23).