Enter appropriated the same “arrow returning” symbol long ago, and the key is colloquially known more often as Enter these days.
(I've had blank looks from a few colleagues after suggesting they press the Return key (that being the term I used to refer to the Return key) - which makes me wonder what percentage of people even know that Return is the name of a key. Perhaps we should retire the term entirely.)
Numpad Enter is definitely a distinct key though, but I've never seen it treated differently than Return (except for randomly not working in some contexts that accept Return)