horoscope vs prediction

horoscope and prediction both are nouns.

Word	Noun	Adjective	Verb	Adverb
horoscope	Yes	No	No	No
prediction	Yes	No	No	No

As nouns, prediction is a hypernym of horoscope; that is, prediction is a word with a broader meaning than horoscope:

horoscope: a prediction of someone's future based on the relative positions of the planets
prediction: a statement made about the future

Other hypernyms of horoscope include forecasting, foretelling, prognostication.

horoscope (noun)	prediction (noun)
a diagram of the positions of the planets and signs of the zodiac at a particular time and place	the act of predicting (as by reasoning about the future)
a prediction of someone's future based on the relative positions of the planets	a statement made about the future