As nouns the difference between passerby and bypass
is that passerby
is alternative spelling of passer-by
is a road that passes around something, such as a residential area.
As a verb bypass is
to avoid an obstacle etc, by constructing or using a bypass.
Other Comparisons: What's the difference?
Alternative spelling of passer-by .
a road that passes around something, such as a residential area
a section of pipe that conducts a fluid around some other fixture
an electrical shunt
(medicine) an alternative passage created to divert a bodily fluid around a damaged organ; the surgical procedure to construct such a bypass
to avoid an obstacle etc, by constructing or using a bypass
to ignore the usual channels or procedures