Implausible expresses doubt of a slightly lesser degree than incredible. Something incredible is literally, "not believable," whereas something implausible MIGHT be true but is highly unlikely.
Cotton Mather held spectral evidence to be implausible.
Implausible is an adjective which means improbable, unlikely, unbelievable, or incredible. Example sentence: The plot of that movie was implausible, I'm not recommending it.
as implausible as it amy sound big foot may be realimplausible: not believable
The Pagans religion is mixed with the Catholic religion.
Yes you could use it as follows; they were fighting over religion.
He is very Fervent about his religion.
Islam is an aboriginal religion.
The philistine did not care for religion.
As implausible as it may sound, southern Florida sometimes does get snow.
regarding ancient near east religion
The most famous sentence using this word is from Karl Marx who said "Religion is the opiate of the people."
Many followers in a monotheistic religion feel their god is omnipotent.
"Some of the instances of a religion are called telepathy, extrasensory perception, or miracles."