Smith averaged 13.5 points and 8.6 rebounds during his two-year stint with Maryland basketball.
The Terps’ 20-game conference slate opens Dec. 14 against Rutgers.
Each team will play six nonconference games.
Hamilton averaged 9.5 points and 4.3 rebounds last year while at Boston College.
The Arlington product is the No. 19 ranked point guard in his class.
Maryland's 2021 recruiting class rises to No. 8 in the nation with Graham's commitment.
Revaz will battle for playing time with Chol Marial and Galin Smith.
Cornish is the No. 77 prospect in the nation per 247Sports.
Smith averaged 1.5 points in 7.6 minutes last season.
Smith averaged 3.1 points and 2.5 rebounds in 31 games last season.