Answer:

shored

Answer	Crossword Clue
SHORED	Bolstered (up)
SHORED	Propped (up)
SHORED	Reinforced, with "up"

SHORED	Propped up.
SHORED	Propped (up).
SHORED	Bolstered (up).
SHORED	Propped up
SHORED	Strengthened
SHORED	... up (propped)
SHORED	Braced
SHORED	Made stable, with "up"

SHORED	Propped
SHORED	Buttressed, with "up"
SHORED	Held (up)
SHORED	Bolstered, with "up"
SHORED	Buttressed (with "up")
SHORED	Reinforced, as a coastline (with "up")