One and only and On the loose

One and only adjective - Eminent beyond or above comparison.

On the loose and one and only are semantically related. In some cases you can use "On the loose" instead an adjective phrase "One and only".

On the loose adjective - Having escaped, especially from confinement.

One and only and on the loose are semantically related. Sometimes you can use "One and only" instead an adjective phrase "On the loose".