stargazer vs daydreamer

stargazer and daydreamer both are nouns.

Word	Noun	Adjective	Verb	Adverb
stargazer	Yes	No	No	No
daydreamer	Yes	No	No	No

As nouns, daydreamer is a hypernym of stargazer; that is, daydreamer is a word with a broader meaning than stargazer:

Other hypernyms of stargazer include woolgatherer.

stargazer (noun)	daydreamer (noun)
heavy-bodied marine bottom-lurkers with eyes on flattened top of the head	someone who indulges in idle or absentminded daydreaming
a physicist who studies astronomy
someone indifferent to the busy world