penetration vs foray

penetration and foray both are nouns.

Word	Noun	Adjective	Verb	Adverb
penetration	Yes	No	No	No
foray	Yes	No	Yes	No

As nouns, foray is a hyponym of penetration; that is, foray is a word with a more specific, narrower meaning than penetration:

Other hyponyms of penetration include interpenetration, breakthrough, invasion, infiltration, maraud, raid.

penetration (noun)	foray (noun)
an attack that penetrates into enemy territory	a sudden short attack
the act of entering into or through something	an initial attempt (especially outside your usual areas of competence)
the act (by a man) of inserting his penis into the vagina of a woman
the depth to which something penetrates (especially the depth reached by a projectile that hits a target)
the ability to make way into or through something
clear or deep perception of a situation

penetration (verb)	foray (verb)
	briefly enter enemy territory
	steal goods; take as spoils