Well, "god" is a word that has various definitions in various cultures. In polytheistic belief systems, there can be a lot of levels of god below the ultimate creator-of-the-universe kind. Indeed, monotheistic faiths basically just shift the emphasis toward the ultimate creator being that's usually a remote, inchoate figure in polytheism (e.g. Chaos in Hesiod's cosmogony) and reduce the pantheons of multiple deities to lesser ranks of being like angels and demons. As I learned in my history studies, monotheistic faiths emerged when societies became more widely traveled and cosmopolitan, more focused on the global than the local, so the emphasis of their religions shifted toward the global as well, and the panoply of local deities that came together to form polytheistic pantheons were de-emphasized in favor of a single cosmic creator/authority figure.
So it stands to reason that beings like the Asgardians, Greek pantheon, etc. in the MCU could qualify as "gods" by some definition without having to be omnipotent, eternal beings like the kind the word is reserved for in monotheism. Or it could just be a vernacular term for advanced beings that have cosmic powers and are often worshipped as gods by mortal beings, like the Eternals. (In the comics, aren't the gods offspring of the Celestials?)
The Gods are extra dimesional mystical beings.
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