15-letter words containing b, u, c, k
- spiny cocklebur — a cocklebur, Xanthium spinosum, introduced into North America from Europe.
- stumbling block — an obstacle or hindrance to progress, belief, or understanding.
- the black stump — an imaginary marker of the extent of civilization (esp in the phrase beyond the black stump)
- turkish tobacco — a strongly aromatic tobacco, grown chiefly in Turkey and Greece, used in cigarettes.