As a proper noun jule
is .
As a noun erg is
the unit of work or energy, being the amount of work done by a dyne working through a distance of one centimeter equal to 10−7 joules or erg can be (geomorphology) a large desert region of sand dunes with little or no vegetation, especially in the sahara.
jule
Not English
Jule has no English definition. It may be misspelled.
erg
English
Etymology 1
From (etyl) .
Noun
(
en noun)
The unit of work or energy, being the amount of work done by a dyne working through a distance of one centimeter. Equal to 10?7 joules.
Etymology 2
From (etyl) .
Noun
(en-noun)
(geomorphology) A large desert region of sand dunes with little or no vegetation, especially in the Sahara.