Notice that they didn't say "bombers"; they said "fighter-bombers". I was confuzzled by that at first, but then remembered that that was an old phrase for what are now called "attack" planes: designed for hitting ground targets like a bomber, but smaller, faster, and more maneuverable, like a fighter. The dedicatd "attack" class of plane was new once, in a world that already had fighters and bombers in it, so they described it in terms of what they were familiar with. The modern American attack plane is the A-10, named "Thunderbolt" or "Warthog". It's about the size of compact light fighters like F-16, F-18 (versions A-D), and F-35. The Arabic source probably just didn't know that such planes are now called "attack" planes in English. (They might still be called the equivalent of "fighter-bomber" in Arabic.)

I'm still not sure why there'd be only one such bomb apiece for multiple planes, though.

Most cruise missiles are not configured to carry nuclear warheads. Israel might not have any that are. I'm not even sure the USA does either; they might not exist at all.