sin, boo-boo, error, misapplication, misapprehension, miscalculation, misconception, misinterpretation,
Any credit mistake can be serious. One is not greater than the other.
infallible works for that
It can be more than one part of speech. My mistakes are legion. (= noun) He often mistakes me for someone else. (=verb)
Depends on the mistake. Serious mistakes can result in serious consquences.
Prude
No, the word 'serious' is an adjective, a word that describes a noun (a serious student, a serious injury).The noun form of the adjective 'serious' is seriousness.
By making some serious mistakes.
you mean excell its ok mistakes are mistakes
Its facitious
The word is likely one of these:severe - serious, or sternsurvivor - one who lives through a serious eventsurveyor - one who measures and marks land and propertysouvenir - a keepsake or memento
The word serious is an adjective. It means to be without any humour.
If you are referring to the word which means "not joking", it is spelled "serious" as in, I was "serious" about selling my Shelby GT 500 for only one dollar.