Noun neaniskos (young man) in the Gospels-Acts

(Translation from NRSV with a few modifications for a more literal meaning)

Matthew

19: 20The young man (neaniskos) said to him, "I have kept all these; what do I still lack?"
19: 22When the young man (neaniskos) heard this word, he went away grieving, for he had many possessions.

Mark

14: 51A certain young man (neaniskos) was following him, wearing nothing but a linen cloth. They caught hold of him,
16: 5As they entered the tomb, they saw a young man (neaniskos), dressed in a white robe, sitting on the right side; and they were alarmed.

Luke

7: 14Then he came forward and touched the bier, and the bearers stood still. And he said, "Young man (neaniskos), I say to you, rise!"

Acts

2: 17'In the last days it will be, God declares, that I will pour out my Spirit upon all flesh, and your sons and your daughters shall prophesy, and your young men (neaniskos) shall see visions, and your old men shall dream dreams.
5: 10Immediately she fell down at his feet and died. When the young men (neaniskos) came in they found her dead, so they carried her out and buried her beside her husband.
23: 18So he took him, brought him to the tribune, and said, "The prisoner Paul called me and asked me to bring this young man (neaniskos) to you; he has something to tell you."
23: 22So the tribune dismissed the young man (neaniskos), ordering him, "Tell no one that you have informed me of this."

1 John

2: 13I am writing to you, fathers, because you know him who is from the beginning. I am writing to you, young men (neaniskos), because you have conquered the evil one.
2: 14I write to you, children, because you know the Father. I write to you, fathers, because you know him who is from the beginning. I write to you, young men (neaniskos), because you are strong and the word of God abides in you, and you have overcome the evil one.