9-letter words containing c, o, m, s
- classroom — A classroom is a room in a school where lessons take place.
- claymores — Plural form of claymore.
- club moss — any mosslike tracheophyte plant of the phylum Lycopodophyta, having erect or creeping stems covered with tiny overlapping leaves
- clubrooms — Plural form of clubroom.
- coal seam — a bed of coal.
- coalmines — Plural form of coalmine.
- cocainism — addiction to cocaine
- cockscomb — the comb of a domestic cock
- codenames — Plural form of codename.
- coenzymes — Plural form of coenzyme.
- cognomens — Plural form of cognomen.
- coliforms — Plural form of coliform.
- coliseums — Plural form of coliseum.
- colobomas — Plural form of coloboma.
- colosseum — an amphitheatre in Rome built about 75–80 ad
- colostomy — A colostomy is a surgical operation in which a permanent opening from the colon is made.
- colostrum — the thin milky secretion from the nipples that precedes and follows true lactation. It consists largely of serum and white blood cells
- colourism — discrimination in which people are judged on the basis of their skin colour
- columbous — niobous.
- columnist — A columnist is a journalist who regularly writes a particular kind of article in a newspaper or magazine.
- combaters — Plural form of combater.
- combovers — Plural form of combover.
- combusted — Simple past tense and past participle of combust.
- combustor — the combustion system of a jet engine or ramjet, comprising the combustion chamber, the fuel injection apparatus, and the igniter
- comebacks — Plural form of comeback.
- comedians — Plural form of comedian.
- comedones — a thickened secretion plugging a duct of the skin, especially of a sebaceous gland; blackhead.
- comedowns — Plural form of comedown.
- comeliest — Superlative form of comely.
- comfiness — the feeling or quality of being comfortable
- comitatus — a retinue of warriors serving a leader, esp in pre-Christian Germanic cultures, such as Anglo-Saxon England and Viking Age Scandinavia
- commandos — Plural form of commando.
- commatism — Conciseness in writing.
- commences — Third-person singular simple present indicative form of commence.
- commensal — (of two different species of plant or animal) living in close association, such that one species benefits without harming the other
- commissar — an official of the Communist Party responsible for political education, esp in a military unit
- commoners — Plural form of commoner.
- commonest — belonging equally to, or shared alike by, two or more or all in question: common property; common interests.
- commonise — Non-Oxford British standard spelling of commonize.
- communise — (British spelling) alternative spelling of communize.
- communism — advocacy of a classless society in which private ownership has been abolished and the means of production and subsistence belong to the community
- communist — A communist is someone who believes in communism.
- commuters — Plural form of commuter.
- compadres — Plural form of compadre.
- companies — Plural form of company.
- company's — a number of individuals assembled or associated together; group of people.
- compassed — Simple past tense and past participle of compass.
- compasses — Plural form of compass.
- compilers — Plural form of compiler.
- complains — Third-person singular simple present indicative form of complain.