English Theasurus that shows all the ways the English word is translated from the original Greek and Hebrew.
English Theasurus from the Hebrew and Greek Strong's Dictionary
forthwith 0629 -- /ocparna/ -- fast, {forthwith}, speed(-ily).
forthwith 2112 ** eutheos ** anon, as soon as, {forthwith}, immediately, shortly,straightway.
forthwith 2117 ** euthus ** anon, by and by, {forthwith}, immediately, straightway.
forthwith 3916 ** parachrema ** {forthwith}, immediately, presently, straightway, soon.