It was suggested that the Greek symbol for the letter "P" (Pi) be attached to this mysterious number by William Jones, a Welsh mathematician in the early 18th century. There is no logical explanation as to why this symbol was chosen.
a an
a or an
rather, preferably, alternately
Like
two
next
you are not
you can use or , otherwise, or rather than.
Three other words instead of saw : stared looked watched
Some other words are warped, skewed, or bent.
since
Also In Addition [to] Plus