Amorites
Amorites was used by the Israelites to refer to certain highland mountaineers, or hillmen (described in Gen. 14:7 as descendants of Canaan) who inhabited that land.
In the Bible, they are described as a powerful people of great stature "like the height of the cedars," who had occupied the land east and west of the Jordan river; their king, Og, being described as the last "of the remnant of the giants" (Deut. 3:11).
The Biblical usage appears to show that the more specific "Amorite" and less precise general "Canaanite" terms were used synonymously. It seems the terms at an early date were interchangeable, Canaan being geographical and Amorite the major ethnical identity of the Canaanites who inhabited the land.
The Biblical Amorites seem to have originally occupied the land stretching from the heights west of the Dead Sea (Gen. 14:7) to Hebron (13. Comp. 13:8; Deut. 3:8; 4:46-48), embracing "all Gilead and all Bashan" (Deut. 3:10), with the Jordan valley on the east of the river (4:49), the land of the "two kings of the Amorites," Sihon and Og (Deut. 31:4; Josh. 2:10; 9:10).
Historically, these Amorites seem to have been linked to the Jerusalem region, and the Jebusites may have been a subgroup of them. The southern slopes of the mountains of Judea are called the "mount of the Amorites" (Deut. 1:7, 19, 20). One possible etymology for "Mount Moriah" is "Mountain of the Amorites," with loss of the initial syllable.
Amorite Kings
Five kings of the Amorites were first defeated with great slaughter by Joshua (10:10). They were again defeated at the waters of Merom by Joshua, who smote them till there were none remaining (Josh. 11:8). It is mentioned as a surprising circumstance that in the days of Samuel there was peace between them and the Israelites (1 Sam. 7:14). The discrepancy supposed to exist between Deut. 1:44 and Num. 14:45 is explained by the circumstance that the terms "Amorites" and "Amalekites" are used synonymously for the "Canaanites." In the same way we explain the fact that the "Hivites" of Gen. 34:2 are the "Amorites" of 48:22. Comp. Josh. 10:6; 11:19 with 2 Sam. 21:2; also Num. 14:45 with Deut. 1:44.
Both Sihon and Og were independent kings.