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:
1 John 3:18: "neither in tongue; but  in deed and in truth."
2 John 1:11: "is partaker of his evil  deeds."
3 John 1:10: "if I come, I will remember his  deeds which he doth, prating against"
Jude 1:15: "all their ungodly  deeds which they have ungodly committed, and of"
Revelation 2:2: "I know thy  works, and thy labor, and thy"
Revelation 2:5: "do the first  works; or else I will come unto thee quickly,"
Revelation 2:6: "that thou hatest the  deeds of the Nicolaitanes, which I also"
Revelation 2:9: "I know thy  works, and tribulation, and poverty, (but"
Revelation 2:13: "I know thy  works, and where thou dwellest, even where Satan's"
Revelation 2:19: "I know thy  works, and charity, and service, and"
Revelation 2:19: "patience, and thy  works; and the last to be more"
Revelation 2:22: "they repent of their  deeds."
Revelation 2:23: "of you according to your  works."
Revelation 2:26: "and keepeth my  works unto the end, to him will I give"
Revelation 3:1: "stars; I know thy  works, that thou hast a name that"
Revelation 3:2: "I have not found thy  works perfect before God."
Revelation 3:8: "I know thy  works: behold, I have set before thee an open"
Revelation 3:15: "I know thy  works, that thou art neither cold nor"
Revelation 9:20: "yet repented not of the  works of their hands, that"
Revelation 14:13: "labors; and their  works do follow them."
Revelation 15:3: "and marvelous are thy  works, Lord God Almighty; just"
Revelation 16:11: "repented not of their  deeds."
Revelation 18:6: "double according to her  works: in the cup which"
Revelation 20:12: "books, according to their  works."
Revelation 20:13: "every man according to their  works."
Revelation 22:12: "every man according as his  work shall be."