shelter tent vs pup tent

shelter tent and pup tent both are nouns.

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

As nouns, shelter tent and pup tent are synonyms defined as:

shelter tent and pup tent: a wedge-shaped tent; usually without a floor or windows

shelter tent (noun)	pup tent (noun)
a wedge-shaped tent; usually without a floor or windows	a wedge-shaped tent; usually without a floor or windows