Words formed from any letters in crackbacks plus optional blank

e -

scare₈

serac₈

f -

scarf₁₁

g -

scrag₁₀

h -

shack₁₄

shark₁₁

l -

slack₁₃

m -

scram₁₁

smack₁₅

n -

snack₁₃

snark₁₀

p -

scarp₁₁

scrap₁₁

spark₁₂

s -

scabs₁₁

scars₈

t -

scart₈

stack₁₂

stark₉

tacks₁₂

takas₉

track₁₂

u -

scaur₉

scrub₁₂

scuba₁₂

v -

varas₉

w -

wacks₁₅

warks₁₂

wrack₁₅

y -

sarky₁₁

scary₁₀

yacks₁₄