pigeon keeping vs pursuit

pigeon keeping and pursuit both are nouns.

Word	Noun	Adjective	Verb	Adverb
pigeon keeping	Yes	No	No	No
pursuit	Yes	No	No	No

As nouns, pursuit is a hypernym of pigeon keeping; that is, pursuit is a word with a broader meaning than pigeon keeping:

Other hypernyms of pigeon keeping include avocation, by-line, hobby, sideline, spare-time activity.

pigeon keeping (noun)	pursuit (noun)
the art and science of breeding domestic pigeons.	the act of pursuing in an effort to overtake or capture
	a diversion that occupies one's time and thoughts (usually pleasantly)
	an auxiliary activity
	a search for an alternative that meets cognitive criteria