Strong's #1411: dunamis (pronounced doo'-nam-is)
 from 1410; force (literally or figuratively); specially, miraculous power (usually by implication, a miracle itself):--ability, abundance, meaning, might(-ily, -y, -y deed), (worker of) miracle(-s), power, strength, violence, mighty (wonderful) work.
Thayer's Greek Lexicon:
 ́ 
 
  dunamis 
 
 1) strength power, ability
 
 1a) inherent power, power residing in a thing by virtue of its nature, or which a person or thing exerts and puts forth
 1b) power for performing miracles
 1c) moral power and excellence of soul
 1d) the power and influence which belong to riches and wealth
 1e) power and resources arising from numbers
 1f) power consisting in or resting upon armies, forces, hosts
 
  Part of Speech: noun feminine
Relation: from G1410
  Citing in TDNT: 2:284, 186
 
Usage:
This word is used 120 times:
Hebrews 7:16: "commandment, but after  the power of an endless life."
Hebrews 11:11: "Sarah herself received  strength to conceive seed, and"
Hebrews 11:34: "Quenched  the violence of fire, escaped the edge of the sword, out of weakness"
1 Peter 1:5: "Who are kept by  the power of God through faith unto salvation"
1 Peter 3:22: "and authorities and  powers being made subject unto him."
2 Peter 1:3: "According as his divine  power hath given unto us all things that"
2 Peter 1:16: "when we made known unto you the  power and coming of our Lord"
2 Peter 2:11: "greater in power and  might, bring not railing accusation"
Revelation 1:16: "shineth in his  strength."
Revelation 3:8: "for thou hast a little  strength, and hast kept my word,"
Revelation 4:11: "and honor and  power: for thou hast created all things,"
Revelation 5:12: "Lamb that was slain to receive  power, and riches, and wisdom,"
Revelation 7:12: "and honor, and  power, and might, be unto our God"
Revelation 11:17: "because thou hast taken to thee thy great  power, and hast reigned."
Revelation 12:10: "is come salvation, and  strength, and the kingdom of our"
Revelation 13:2: "gave him his  power, and his seat, and"
Revelation 15:8: "and from his  power; and no man was able to enter"
Revelation 17:13: "and shall give their  power and strength unto the beast."
Revelation 18:3: "are waxed rich through the  abundance of her delicacies."
Revelation 19:1: "and honor, and  power, unto the Lord our God:"