Noun kokkos (seed) in the Gospels-Acts

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

Matthew

13: 31He put before them another parable: "The kingdom of heaven is like a mustard seed (kokkos) that someone took and sowed in his field;
17: 20He said to them, "Because of your little faith. For truly I tell you, if you have faith the size of a mustard seed (kokkos), you will say to this mountain, 'Move from here to there,' and it will move; and nothing will be impossible for you."

Mark

4: 31It is like a mustard seed (kokkos), which, when sown upon the ground, is the smallest of all the seeds on earth;

Luke

13: 19It is like a mustard seed (kokkos) that someone took and sowed in the garden; it grew and became a tree, and the birds of the air made nests in its branches."
17: 6The Lord replied, "If you had faith the size of a mustard seed (kokkos), you could say to this mulberry tree, 'Be uprooted and planted in the sea,' and it would obey you.

John

12: 24Very truly, I tell you, unless a seed (kokkos) of wheat falls into the earth and dies, it remains just a single grain; but if it dies, it bears much fruit.