Early on and Out-of-date

Early on adverb - During an early stage.

Out-of-date and early on are semantically related. in inappropriate topic. In some cases you can use "Out-of-date" instead an adjective phrase "Early on".

Out-of-date adjective - Having passed its time of use or usefulness.

Early on and out-of-date are semantically related. Sometimes you can use "Early on" instead an adjective phrase "Out-of-date".