9-letter words containing a, b, s, o
- low brass — an alloy of about 80 percent copper and 20 percent zinc, with traces of lead and iron.
- mailboxes — Plural form of mailbox.
- marabouts — Plural form of marabout.
- mason bee — any of numerous solitary bees, as of the family Megachilidae, that construct nests of clay.
- mass book — missal (def 1).
- may blobs — marsh marigold.
- mesoblast — the mesoderm.
- microbars — Plural form of microbar.
- mislabour — to labour wrongly
- moneybags — a bag for money.
- monobasic — Chemistry. (of an acid) containing one replaceable hydrogen atom.
- monoblast — A cell, normally found in bone marrow, that matures into a monocyte.
- moonbeams — Plural form of moonbeam.
- mopboards — Plural form of mopboard.
- mosbacher — Emil, Jr ("Bus") 1922–1997, U.S. yacht racer and government official.
- mossbacks — Plural form of mossback.
- mossbauer — Rudolf L [roo-dawlf] /ˈru dɔlf/ (Show IPA), 1929–2011, German physicist: Nobel prize 1961.
- mothballs — a small ball of naphthalene or sometimes of camphor for placing in closets or other storage areas to repel moths from clothing, blankets, etc.
- nabonidus — died 539? b.c, last king of Babylonia 556–539 (father of Belshazzar).
- nanotubes — Plural form of nanotube.
- newsboard — bulletin board.
- noble gas — any of the chemically inert gaseous elements of group 8A or 0 of the periodic table: helium, neon, argon, krypton, xenon, and radon.
- nonbiased — Not biased.
- nonblacks — Plural form of nonblack.
- nonusable — not usable; unusable
- nosebands — Plural form of noseband.
- obeisance — a movement of the body expressing deep respect or deferential courtesy, as before a superior; a bow, curtsy, or other similar gesture.
- obfuscate — to confuse, bewilder, or stupefy.
- oblations — Plural form of oblation.
- obligates — Third-person singular simple present indicative form of obligate.
- obscurant — a person who strives to prevent the increase and spread of knowledge.
- obsecrate — to entreat solemnly; beseech; supplicate.
- obsequial — Relating to an obsequy or funeral rite.
- observant — quick to notice or perceive; alert.
- obstacles — Plural form of obstacle.
- obstinacy — the quality or state of being obstinate; stubbornness.
- obstinant — (proscribed) Obstinate.
- obstinate — firmly or stubbornly adhering to one's purpose, opinion, etc.; not yielding to argument, persuasion, or entreaty.
- ombudsman — a government official who hears and investigates complaints by private citizens against other officials or government agencies.
- opposable — capable of being placed opposite to something else: the opposable thumb of primates.
- osaka bay — an inlet of the Pacific in S Honshu, S Japan
- osnabruck — a city in Lower Saxony, in NW Germany.
- outboards — Plural form of outboard.
- outbreaks — Plural form of outbreak.
- overbears — Third-person singular simple present indicative form of overbear.
- pasodoble — fast modern ballroom dance
- polybasic — (of an acid) having two or more atoms of replaceable hydrogen.
- post-boat — mailboat.
- preabsorb — to absorb beforehand or in advance
- psalmbook — a book containing psalms for liturgical or devotional use.