Doubt and Unknown quantity

Doubt noun - A feeling or attitude that one does not know the truth, truthfulness, or trustworthiness of someone or something.

Unknown quantity and doubt are semantically related. In some cases you can use "Unknown quantity" instead a noun "Doubt".

Nearby Words: doubtful, doubtless, doubting, doubtfulness, doubted

Unknown quantity noun - A factor in a given situation whose bearing and importance is not apparent.

Doubt and unknown quantity are semantically related. Sometimes you can use "Doubt" instead a noun phrase "Unknown quantity".