I believe both of these mean 24 hours as something is open 24 hours. How do you pronounce these. I guess if someone could write out what they mean π.χ. είκοσι τεσσεράωρο? Also, it would seem that it should always be plural since 24 hours is plural but I see it both ways 24ωρο και 24ωρα or are these adjectives so you would also have masc and fem as well?