Yes, the Amorite were literally really tall people. They are listed with the tribes living in Canaan with the other giants in Gen. 15:18-21.
"18 In that day hath Jehovah made with Abram a covenant, saying, `To thy seed I have given this land, from the river of Egypt unto the great river, the river Phrat, 19 with the Kenite, and the Kenizzite, and the Kadmonite, 20 and the Hittite, and the Perizzite, and the Rephaim, 21 and the Amorite, and the Canaanite, and the Girgashite, and the Jebusite.'” (YLT)
Deu. 4:46-47 lists two kings of the Amorite whom the children of Israel defeated.
"46 On this side Jordan, in the valley over against Bethpeor, in the land of Sihon king of the Amorites, who dwelt at Heshbon, whom Moses and the children of Israel smote, after they were come forth out of Egypt: 47 And they possessed his land, and the land of Og king of Bashan, two kings of the Amorites, which were on this side Jordan toward the sunrising;" (KJV)
King Og of Bashan was a giant described in Deu. 3:11-13.
"11 For only Og king of Bashan remained of the remnant of giants; behold his bedstead was a bedstead of iron; is it not in Rabbath of the children of Ammon? nine cubits was the length thereof, and four cubits the breadth of it, after the cubit of a man.
12 And this land, which we possessed at that time, from Aroer, which is by the river Arnon, and half mount Gilead, and the cities thereof, gave I unto the Reubenites and to the Gadites.
13 And the rest of Gilead, and all Bashan, being the kingdom of Og, gave I unto the half tribe of Manasseh; all the region of Argob, with all Bashan, which was called the land of giants." (KJV)
Excerpt from my post "Giants: Rephaim, Zamzummim, Emim, Amorite, Anakim, Nephilim, Zuzim" -
"Deu. 2:10-11, ” The Emim formerly have dwelt in it, a people great, and numerous, and tall, as the Anakim; 11 Rephaim they are reckoned, they also, as the Anakim; and the Moabites call them Emim.”
The Emim were compared to the Anakim (the sons of Anak), a great, numerous, and tall people. So, the Emim, or Rephaim, and Anakim were tribes of very tall people, viewed as giants by the rest of mankind. People are men and women and children of the species of man.
Again speaking of the land which God gave to Lot –
Deu. 2::20-21, “A land of Rephaim it is reckoned, even it; Rephaim dwelt in it formerly, and the Ammonites call them Zamzummim; 21 a people great, and numerous, and tall, as the Anakim, and Jehovah destroyeth them before them, and they dispossess them, and dwell in their stead,”
So, the Rephaim were called Zamzummim by the Ammonite, and Emim by the Moabite.
After battling the Amorite, and defeating King Sihon, the Israelite turned to the land of King Og of Bashan, and all his kingdom of Argob." and
"Og was one of the Rephaim. A common or short cubit was about 18 inches, by the length of an average man’s fingertips to his elbow. The long cubit was 20 -22 inches. So, if Og’s bed was 9 cubits long x 4 cubits wide, then Og had to be able to fit within that length and width. If we use the short or common cubit of 18 inches, then at a minimum, Og had to be somewhere under 13.5 feet tall in order to lie down on his bed. If we use the long measure, then Og could have been as tall as 16 feet.
Og was the last of the Rephaim, the same giants whom the Ammonite called the Zamzummim, and whom the Moabite called the Emim. They were as tall as another tribe of giants, the sons of Anak called the Anakim. Deu. 4:46-47 says that Og was one of the two kings of the Amorite who were dispossessed, the other being king Sihon.
The Rephaim – known also as Zamzummim, and Emim – were of the Amorite."
You can read the rest of my post here.