ferroconcrete

n [U] = reinforced concrete (reinforce).

femme fatale, femoral, femur, fen, fence, fencer, fencing, fend, fender, fennel, feral, ferment, fermentation, fern, ferny, ferocious, ferociously, ferocity, ferret, Ferris wheel, ferrous, ferrule, ferry, ferry-boat, ferryboat, ferryman, fertile, fertility, fertilization, fertilisation, fertilize, fertilize, fertilise, fertilizer, fertilizer, fertiliser, fervent, fervently, fervid, fervidly, fervor, fervour (US fervor), festal,