[ابو بيشو]

We need to discover another source of income, beside oil.
We need to discover another source of income, besides oil:\
.................................................. .................................................. ........................................
We went swimming in the river besides my house.
We went swimming in the river beside my house.
beside = next to: 'She walked over and sat down beside me.' "
besides = in addition to; also: 'Who did you Invite besides Tom and
Maty?' 'Besides tennis, what other games do you play?' 'I'm too old to
apply for the job. Besides, it would mean moving house.'