stepbrother

step·broth·er

noun \ˈstep-ˌbrə-thər\

: the son of your stepmother or stepfather

Full Definition of STEPBROTHER

:  a son of one's stepparent by a former partner

First Known Use of STEPBROTHER

15th century

Rhymes with STEPBROTHER

another, big brother, blood brother, den mother, each other, earth mother, foremother, godmother, grandmother, half brother, housemother, queen mother, soul brother, stepmother