This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Appealing to the intellect or powers of reasoning; convincing: a cogent argument. See Synonyms at valid.

adj. Reasonable and convincing; based on evidence.

adj. Appealing to the intellect or powers of reasoning.

adj. Forcefully persuasive.

adj. Compelling, in a physical sense; powerful.

adj. Having the power to compel conviction or move the will; constraining; conclusive; forcible; powerful; not easily reasisted.

Compelling by physical force; potent; irresistible by physical means.

Compelling assent or conviction; appealing powerfully to the intellect or moral sense; not easily denied or refuted: as, a cogent reason or argument.

adj. powerfully persuasive

"You speak with a clear voice and in cogent paragraphs, and make a great case for our progressive causes."

persuasive   

unconvincing   

cogency   

persuasive    potent    conclusive    strong    forcible    urgent    convincing    powerful    influential    constraining   

conclusive    unanswerable    irrefutable    forcible    weighty    concise    incisive    lucid    plausible    convince