pursue vs stalk

pursue is not a noun while stalk is a noun.

Word	Noun	Adjective	Verb	Adverb
pursue	No	No	Yes	No
stalk	Yes	No	Yes	No

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

Other hyponyms of pursue include chase, chase after, dog, give chase, go after, tag, tail, track, trail, haunt.

pursue (noun)	stalk (noun)
	a stiff or threatening gait
	the act of following prey stealthily
	a hunt for game carried on by following it stealthily or waiting in ambush
	a slender or elongated structure that supports a plant or fungus or a plant part or plant organ
	material consisting of seed coverings and small pieces of stem or leaves that have been separated from the seeds

pursue (verb)	stalk (verb)
go in search of or hunt for	walk stiffly
follow in or as if in pursuit	follow stealthily or recur constantly and spontaneously to
carry out or participate in an activity; be involved in	go through (an area) in search of prey
carry further or advance