When I tried to look up "fall" in my dictionary, it took me three tries before I could find the definition of the season, there was such a long list of other mneanings.
In New England, there is such a preponderance of deciduous trees that the change of foliage from green to barren is very striking. People there say "fall" much more often than autumn, which is used for the time when the leaves are changing color, due to production of a red colored substitute for chlorophyll.
Here in Southern California, there is no fall, just a moderate change in the number of green leaves. Only a few
trees show bare limbs. But there isn't any autumn, either.
Never any pretty colored red and yellow leaves. And roses bloom the year round, just less spectacular between summer and spring.