Synonyms for Defend:

n.

back (noun)
stand up for.

v.

apologize (verb)
apologize, plead, repent, atone, confess, regret.
competition (verb)
guard, hold.
social (verb)
represent.
support (verb)
stick up for.

Other synonyms:

entrench, cover up for, advocate. cherish, vindicate. escort, mine. look after. guarantee, watch. cover
fend, watch over.
fend off
keep off.
keep off
fend off.
protect
safeguard, shield.
rescue
save.

Usage examples for defend

  1. We shall remain with you at our post to defend your interests. – A Journey Through France in War Time by Joseph G. Butler, Jr.
  2. But let the king remember him and send fifty men as a garrison to defend the country. – Early Israel and the Surrounding Nations by Archibald Sayce