dream vs reverie

dream and reverie both are nouns.

Word	Noun	Adjective	Verb	Adverb
dream	Yes	No	Yes	No
reverie	Yes	No	No	No

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

As nouns, reverie is a hypernym of dream; that is, reverie is a word with a broader meaning than dream:

dream: a state of mind characterized by abstraction and release from reality
reverie: an abstracted state of absorption

Other hypernyms of dream include revery.

dream (noun)	reverie (noun)
a series of mental images and emotions occurring during sleep	an abstracted state of absorption
imaginative thoughts indulged in while awake	absentminded dreaming while awake
a fantastic but vain hope (from fantasies induced by the opium pipe)
a state of mind characterized by abstraction and release from reality
a cherished desire
someone or something wonderful

dream (verb)	reverie (verb)
have a daydream; indulge in a fantasy
experience while sleeping