pup tent vs collapsible shelter

pup tent and collapsible shelter both are nouns.

Word	Noun	Adjective	Verb	Adverb
pup tent	Yes	No	No	No
collapsible shelter	Yes	No	No	No

As nouns, collapsible shelter is a hypernym of pup tent; that is, collapsible shelter is a word with a broader meaning than pup tent:

pup tent: a wedge-shaped tent; usually without a floor or windows
collapsible shelter: a portable shelter (usually of canvas stretched over supporting poles and fastened to the ground with ropes and pegs)

Other hypernyms of pup tent include tent.

pup tent (noun)	collapsible shelter (noun)
a wedge-shaped tent; usually without a floor or windows	a portable shelter (usually of canvas stretched over supporting poles and fastened to the ground with ropes and pegs)