9-letter words containing um
- circumfix — a prefix and a suffix attached to a root or stem, as the a and -ing in a-going.
- claustrum — a thin layer of grey matter in the brain
- clitellum — a thickened saddle-like region of epidermis in earthworms and leeches whose secretions bind copulating worms together and later form a cocoon around the eggs
- clumpiest — Superlative form of clumpy.
- clumsiest — awkward in movement or action; without skill or grace: He is very clumsy and is always breaking things.
- coccidium — any parasitic protozoan of the order Coccidia
- coenobium — a monastery or convent
- colchicum — any Eurasian liliaceous plant of the genus Colchicum, such as the autumn crocus
- coliseums — Plural form of coliseum.
- collegium — (in the former Soviet Union) a board in charge of a department
- colluvium — a mixture of rock fragments from the bases of cliffs
- collyrium — any medicated preparation for the eyes; eyewash
- colosseum — an amphitheatre in Rome built about 75–80 ad
- colostrum — the thin milky secretion from the nipples that precedes and follows true lactation. It consists largely of serum and white blood cells
- columbary — a dovecote
- columbate — any salt of columbic acid
- columbian — of or relating to the United States
- columbine — any plant of the ranunculaceous genus Aquilegia, having purple, blue, yellow, or red flowers with five spurred petals
- columbite — a black mineral consisting of a niobium oxide of iron and manganese in orthorhombic crystalline form: occurs in coarse granite, often with tantalite, and is an ore of niobium. Formula: (Fe, Mn)(Nb)2O6
- columbium — niobium
- columbous — niobous.
- columella — the central part of the spore-producing body of some fungi and mosses
- columnist — A columnist is a journalist who regularly writes a particular kind of article in a newspaper or magazine.
- combretum — any tree or shrub belonging to the genus Combretum, native mainly to tropical and subtropical Africa and producing attractive flowers
- consumate — Misspelling of consummate.
- consumers — a person or thing that consumes.
- consumeth — Archaic third-person singular form of consume.
- consuming — A consuming passion or interest is more important to you than anything else.
- contagium — the specific virus or other direct cause of any infectious disease
- continuum — A continuum is a set of things on a scale, which have a particular characteristic to different degrees.
- contumacy — obstinate and wilful rebelliousness or resistance to authority; insubordination; disobedience
- contumely — scornful or insulting language or behaviour
- conundrum — A conundrum is a problem or puzzle which is difficult or impossible to solve.
- core dump — a copy of main memory that is printed, displayed, or recorded on an output medium.
- cormidium — a collection of polyps in a siphonophore
- costumers — a person who makes, sells, or rents costumes, as for theatrical productions.
- costumery — multiple costumes considered collectively
- costumier — A costumier is a person or company that makes or supplies costumes.
- costuming — a style of dress, including accessories and hairdos, especially that peculiar to a nation, region, group, or historical period.
- coumarone — a colorless liquid, C8H6O, derived from coal tar and combined with indene to produce synthetic resins used in paints, adhesives, etc.
- credendum — an article of faith
- cribellum — a sievelike spinning organ in certain spiders that occurs between the spinnerets
- criterium — a bicycle road race, consisting of numerous laps of a short closed circuit
- crumbiest — Superlative form of crumby.
- crumbling — to break into small fragments or crumbs.
- crumhorns — Plural form of crumhorn.
- crummiest — Superlative form of crummy.
- crumpling — Present participle of crumple.
- ctenidium — one of the comblike respiratory gills of molluscs
- cubiculum — an underground burial chamber in Imperial Rome, such as those found in the catacombs