rift valley vs vale

rift valley and vale both are nouns.

Word	Noun	Adjective	Verb	Adverb
rift valley	Yes	No	No	No
vale	Yes	No	No	No

As nouns, vale is a hypernym of rift valley; that is, vale is a word with a broader meaning than rift valley:

rift valley: a valley with steep sides; formed by a rift in the earth's crust
vale: a long depression in the surface of the land that usually contains a river

Other hypernyms of rift valley include valley.

rift valley (noun)	vale (noun)
a valley with steep sides; formed by a rift in the earth's crust	a long depression in the surface of the land that usually contains a river