Matter-of-factly and One and only

One and only and matter-of-factly are semantically related. In some cases you can use "One and only" instead an adverb phrase "Matter-of-factly".

One and only adjective - Eminent beyond or above comparison.

Matter-of-factly and one and only are semantically related. Sometimes you can use "Matter-of-factly" instead an adverb phrase "One and only".