Strong's #2041: ergon (pronounced er'-gon)
 from a primary (but obsolete) ergo (to work); toil (as an effort or occupation); by implication, an act:--deed, doing, labour, work.
Thayer's Greek Lexicon:
 ̓́ 
 
  ergon 
 
 1) business, employment, that which any one is occupied
 
 1a) that which one undertakes to do, enterprise, undertaking
 
 2) any product whatever, any thing accomplished by hand, art, industry, or mind
 3) an act, deed, thing done: the idea of working is emphasised in opp. to that which is less than work
 
  Part of Speech: noun neuter
Relation: from a primary (but obsolete) ergo (to work)
  Citing in TDNT: 2:635, 251
 
Usage:
This word is used 176 times:
Romans 3:20: "Therefore by  the deeds of the law there shall no flesh be justified"
Romans 3:27: "By what law?  of works? Nay: but by the law"
Romans 3:28: "is justified by faith without  the deeds of the law."
Romans 4:2: "Abraham were justified by  works, he hath whereof to glory; but not"
Romans 4:6: "imputeth righteousness without  works,"
Romans 9:11: "might stand, not of  works, but of him that calleth;)"
Romans 9:32: "but as it were by  the works of the law. For they stumbled at that stumblingstone;"
Romans 11:6: "by grace, then is it no more of  works: otherwise grace is no more"
Romans 11:6: "But if it be of  works, then is it no more grace: otherwise"
Romans 11:6: "it no more grace: otherwise  work is no more work."
Romans 11:6: "work is no more  work."
Romans 13:3: "not a terror to good  works, but to the evil. Wilt"
Romans 13:12: "let us therefore cast off the  works of darkness, and let us put on the"
Romans 14:20: "destroy not the  work of God. All things indeed are pure;"
Romans 15:18: "make the Gentiles obedient, by word and  deed,"
1 Corinthians 3:13: "Every man's  work shall be made manifest: for the day shall declare"
1 Corinthians 3:13: "fire shall try every man's  work of what sort it is."
1 Corinthians 3:14: "If any man's  work abide which he hath built thereupon, he shall receive a reward."
1 Corinthians 3:15: "If any man's  work shall be burned, he shall suffer loss: but he himself shall be saved; yet"
1 Corinthians 5:2: "that he that hath done this  deed might be taken away from among you."
1 Corinthians 9:1: "not ye my  work in the Lord?"
1 Corinthians 15:58: "abounding in the  work of the Lord, forasmuch as ye know that"
1 Corinthians 16:10: "for he worketh the  work of the Lord, as I also"
2 Corinthians 9:8: "all things, may abound to every good  work:"
2 Corinthians 10:11: "when we are absent, such will we be also  in deed when we are present."
2 Corinthians 11:15: "shall be according to their  works."
Galatians 2:16: "is not justified by  the works of the law, but by the faith"
Galatians 2:16: "and not by  the works of the law: for by the works"
Galatians 2:16: "of the law: for by  the works of the law shall no flesh be justified."
Galatians 3:2: "ye the Spirit by  the works of the law, or by the hearing"
Galatians 3:5: "miracles among you, doeth he it by  the works of the law, or by"
Galatians 3:10: "as many as are of  the works of the law are under the curse:"
Galatians 5:19: "Now the  works of the flesh are manifest, which"
Galatians 6:4: "let every man prove his own  work, and then shall he have rejoicing"
Ephesians 2:9: "Not of  works, lest any man should boast."
Ephesians 2:10: "Jesus unto good  works, which God hath before ordained that"
Ephesians 4:12: "of the saints, for  the work of the ministry, for the edifying of the"
Ephesians 5:11: "have no fellowship with the unfruitful  works of darkness, but rather"
Philippians 1:6: "of this very thing, that he which hath begun a good  work in you will perform"
Philippians 1:22: "this is the fruit of my  labor: yet what I shall choose I wot"
Philippians 2:30: "Because for the  work of Christ he was nigh unto death,"
Colossians 1:10: "in every good  work, and increasing in the"
Colossians 1:21: "in your mind by wicked  works, yet now hath he reconciled"
Colossians 3:17: "ye do in word or  deed, do all in the name"
1 Thessalonians 1:3: "Remembering without ceasing your  work of faith, and labor of love,"
1 Thessalonians 5:13: "very highly in love  for their work's sake."
2 Thessalonians 1:11: "fulfill all the good pleasure of his goodness, and  the work of faith with"
2 Thessalonians 2:17: "good word and  work."
1 Timothy 2:10: "godliness) with good  works."
1 Timothy 3:1: "the office of a bishop, he desireth a good  work."