As verbs the difference between outnumber and outweigh
is that outnumber is to be more in number than somebody or something while outweigh is to exceed in weight or mass.
outnumber
English
Verb
(
en verb)
to be more in number than somebody or something.
- Women outnumbered men by two to one.
outweigh
English
Verb
(
en verb)
To exceed in weight or mass.
To exceed in importance or value.
*
- The advantage was so great that it would have taken a lot of failures to outweigh it.