Yes, although you need to think about the application. (how long, how far back, teh shape, glue method, if TTW, etc..
Basswood is a single cut plank of 'stronger' wood than traditional Balsa. it'll still break along the grain.. But is lighter than ply
Ply is layers of good hard wood (typically Birch) with alternating layer for added strength & stiffness.. Less likely to warp or curl but is heavier.. But you could use a thinner sheet of ply than a single sheet of Basswood..
TTW = Thru the wall, where the fin has a tab that goes thru the body tube and glues to the motor mount. Most high-end kits have this feature these days.