Here is a list of nouns that start with COM.

comb, combat, combatant, combination, combine

combo, combustion, comeback, comedian, comedy

comer, comet, comfort, comic, coming

comma, command, commandant, commander, commanding

commandment, commando, commencement, commendation, comment

commentary, commentator, commerce, commercial, commercialism

commercialization, commissary, commission, commissioner, commitment

committee, committeemen, committeewoman, committment, commodity

common, commonplace, commonwealth, commotion, commune

communicating, communication, communicator, communion, communism

communist, community, commutation, commuter, compact

companion, companionship, companionway, company, comparison

compartment, compassion, compatability, compatriot, compendium

compensation, competence, competency, competition, competitor

compilation, compiler, complacency, complainant, complaint

complaisance, complection, complement, completion, complex

complexion, complexity, compliance, complication, complicity

compliment, component, comportment, composer, composing

composite, composition, compost, composure, compote

compound, comprehension, compressibility, compression, compressor

compromise, compromising, compulsion, compulsivity, computation

computer, comrade, comradeship

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