"overgrown with bushes," Scottish and northern English, mid-15c., from scrog (n.) "a stunted bush, a shrub-like plant" (c. 1400), probably related to scrag "a lean person or thing" (1570s); compare scraggly.
scritch
scrivener
scrod
scrofula
scrofulous
scroggy
scroll
scrollwork
Scrooge
scrotum
scrounge