portal vs entrance

portal and entrance both are nouns.

Word	Noun	Adjective	Verb	Adverb
portal	Yes	No	No	No
entrance	Yes	No	Yes	No

As nouns, entrance is a hypernym of portal; that is, entrance is a word with a broader meaning than portal:

Other hypernyms of portal include entranceway, entree, entry, entryway.

portal (noun)	entrance (noun)
a grand and imposing entrance (often extended metaphorically)	the act of entering
a short vein that carries blood into the liver	something that provides access (to get in or get out)
a site that the owner positions as an entrance to other sites on the internet	a movement into or inward

portal (verb)	entrance (verb)
	put into a trance
	attract; cause to be enamored