pore vs engross

pore is a noun but engross is not a noun.

Word	Noun	Adjective	Verb	Adverb
pore	Yes	No	Yes	No
engross	No	No	Yes	No

As verbs, engross is a hyponym of pore; that is, engross is a word with a more specific, narrower meaning than pore:

Other hyponyms of pore include absorb, engulf, immerse, plunge, soak up, steep, recall, think, zoom in, hear, listen, take heed.

pore (noun)	engross (noun)
any small opening in the skin or outer surface of an animal
a minute epidermal pore in a leaf or stem through which gases and water vapor can pass
any tiny hole admitting passage of a liquid (fluid or gas)

pore (verb)	engross (verb)
direct one's attention on something	consume all of one's attention or time
	devote (oneself) fully to