Grenade

[mcgillianaire]

"small explosive shell," 1591, from M.Fr. grenade "pomegranate," from O.Fr. pomegrenate (influenced by Sp. granada), so called because the many-seeded fruit suggested the powder-filled, fragmenting bomb, or from similarities of shape. Grenadiers (1676) originally were soldiers "who were dexterous in flinging hand-granados" [Evelyn], from French grenadier; later "the tallest and finest men in the regiment."

Comments

[drunkendeadcat.livejournal.com]

so that's what a grenade is

[pappubahry.livejournal.com]

pomegranate
Pommy-grant (rhyming slang for 'immigrant', originally applied to recent English immigrants to Australia) is what gives us today 'Pom' and 'Pommy'.