stargazer vs Claudius Ptolemaeus

stargazer and Claudius Ptolemaeus both are nouns.

Word	Noun	Adjective	Verb	Adverb
stargazer	Yes	No	No	No
Claudius Ptolemaeus	Yes	No	No	No

stargazer (noun)	Claudius Ptolemaeus (noun)
heavy-bodied marine bottom-lurkers with eyes on flattened top of the head	Alexandrian astronomer (of the 2nd century) who proposed a geocentric system of astronomy that was undisputed until the late Renaissance
a physicist who studies astronomy
someone indifferent to the busy world