8-letter words containing a, u, m, b
- olibanum — frankincense.
- penumbra — Astronomy. the partial or imperfect shadow outside the complete shadow of an opaque body, as a planet, where the light from the source of illumination is only partly cut off. Compare umbra (def 3a). the grayish marginal portion of a sunspot. Compare umbra (def 3b).
- plumbago — graphite.
- plumbate — a compound formed from lead oxide
- radium b — an isotope of lead, formed by decay of radium A, that gives rise to radium C, which is an isotope of bismuth, from which radium D, radium E, and radium F, or polonium 210, are derived.
- rambutan — the bright-red oval fruit of a Malayan, sapindaceous tree, Nephelium lappaceum, covered with soft spines, or hairs, and having a subacid taste.
- rombauer — Irma von Starkloff [stahrk-lawf,, ‐lof] /ˈstɑrk lɔf,, ‐lɒf/ (Show IPA), 1877–1962, U.S. cooking expert and cookbook writer.
- scybalum — hard faeces in the intestine
- stamboul — Istanbul
- subclaim — a claim that is part of a larger claim
- subhuman — less than or not quite human.
- subimago — the first winged stage of the mayfly, with dull opaque wings, known to anglers as a dun, before it metamorphoses into the shiny gauzy imago or spinner
- summable — capable of being added.
- tablinum — (in an ancient Roman house) a large, open room at the side of the peristyle farthest from the main entrance.
- tamboura — an Asian musical instrument of the lute family having a small, round body and a long neck.
- tombaugh — Clyde William, 1906–97, U.S. astronomer: discovered Pluto 1930.
- umbonate — having an umbo or projecting boss.
- umbrated — drawn in a faint or shaded manner
- umbratic — of or relating to the shade or shadows
- umbrella — a light, small, portable, usually circular cover for protection from rain or sun, consisting of a fabric held on a collapsible frame of thin ribs radiating from the top of a carrying stick or handle.
- unblamed — not blamed or censured; free from being blamed
- urbanism — the way of life of people who live in a large city.
- urubamba — a river rising in SE Peru, flowing NW through the Andes Mountains to central Peru to meet the Apurímac River and form the Ucayali River. 450 miles (725 km) long.
- usumbura — former name of Bujumbura.