Pyrrhonist
Sabbath-breaker
apostate
atheist
backslider
blasphemer
deserter
disbeliever
doubter
doubting Thomas
freethinker
gentile
giaour
goy
heathen
heretic
infidel
kaffir
minimifidian
misbeliever
miscreant
non-Christian
non-Jew
non-Mohammedan
non-Mormon
non-Moslem
non-Muhammadan
non-Muslim
non-believer
nonbeliever
nothingarian
nullifidian
pagan
recidivist
recreant
renegade
sacrilegist
secularist
shegets
shiksa
skeptic
zendician
zendik
nonreligious person
irreligionist
materialist
adulterer
blasphemers
deist
dogmatist
idolater
perjurer
redresser
sceptic
skeptics
the
topcoat
believer