Cekovsky went 8 for 9 from the floor in tying his career high for points, set earlier this season against Kansas State. The 7-foot-1 junior also blocked three shots.
Cekovsky started at center for senior Damonte Dodd, who has a sprained left MCL and will be sidelined for at least two more games before being re-evaluated. Dodd leads the team with 17 blocked shots.
Maryland (9-1) led by seven at halftime, upped the margin to 17 with 15:57 remaining and cruised to the finish.
Brantley drilled four 3-pointers on a night the Terrapins received just 10 points from standout guard Melo Trimble.
Charles Williams scored 21 for Howard (1-6) and Solomon Mangham had 16.