seer vs observer

seer and observer both are nouns.

Word	Noun	Adjective	Verb	Adverb
seer	Yes	No	No	No
observer	Yes	No	No	No

As nouns, observer is a hypernym of seer; that is, observer is a word with a broader meaning than seer:

seer: an observer who perceives visually
observer: a person who becomes aware (of things or events) through the senses

Other hypernyms of seer include beholder, perceiver, percipient.

seer (noun)	observer (noun)
a person with unusual powers of foresight	a person who becomes aware (of things or events) through the senses
an authoritative person who divines the future	an expert who observes and comments on something
an observer who perceives visually