shelter vs oasis

shelter and oasis both are nouns.

Word	Noun	Adjective	Verb	Adverb
shelter	Yes	No	Yes	No
oasis	Yes	No	No	No

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

shelter (noun)	oasis (noun)
a structure that provides privacy and protection from danger	a shelter serving as a place of safety or sanctuary
protective covering that provides protection from the weather	a fertile tract in a desert (where the water table approaches the surface)
temporary housing for homeless or displaced persons
a way of organizing business to reduce the taxes it must pay on current earnings
the condition of being protected

shelter (verb)	oasis (verb)
invest (money) so that it is not taxable
provide shelter for