Answer:
Month and flower are the nouns
I would assume during the early stages of humans, we knew we lived in the Solar system, but we decide to use only since we thought we were the only people in the cosmos<span />
Different- mount olympus is in nyc at the top of the empire state building (an actual place in the human world) & above the world (very top floor that does not really exists to humans); underworld is a place that non humans never see/know of & it's under the world