monolatry; monolatrism
A technical term in religious studies: worship of one god while acknowledging the existence of other gods. Rare in everyday Japanese; used in academic or theological contexts.
The religion of ancient Israel is said to have developed from monolatry to monotheism.
Monolatry, unlike monotheism, does not deny the existence of other gods.
Monotheism: belief in only one god, denying the existence of others. 拝一神教 allows other gods but worships only one.
Polytheism: worship of multiple gods. 拝一神教 is a middle ground between polytheism and monotheism.
Compound of 拝 (worship), 一 (one), 神 (god), and 教 (teaching/religion). A modern academic term, likely coined as a translation of Western 'monolatry'.