defense (n.)

• aegis
• answer
• apologetics
• apologia
• apology
• argument
• argumentation
• armament
• armor
• arms
• backfire
• backstop
• bank
• bar
• barrage
• barrier
• bicker
• bickering
• boom
• breakwater
• breastwork
• buffer
• bulkhead
• bulwark
• casuistry
• cofferdam
• comeback
• confutation
• contention
• controversy
• counterattack
• counterblast
• counterblow
• countercharge
• counterclaim
• counterfire
• counterinsurgency
• countermeasure
• counterrevolution
• cover
• dam
• demurrer
• denial
• dike
• disputation
• dispute
• ditch
• earthwork
• embankment
• exception
• exculpation
• excuse
• explanation
• eye
• fastness
• fence
• fort
• fortress
• gate
• groin
• guard
• hassle
• hubbub
• jam
• jetty
• justification
• lee
• levee
• litigation
• logjam
• logomachy
• milldam
• moat
• mole
• mound
• objection
• parapet
• plea
• pleading
• pleadings
• polemic
• polemics
• portcullis
• preservation
• protection
• rampart
• rationalization
• rebuttal
• rebutter
• refuge
• refutation
• rejoinder
• replication
• reply
• response
• retort
• return
• rhubarb
• riposte
• roadblock
• safeguard
• safekeeping
• safety
• seawall
• security
• set-to
• shade
• shadow
• shelter
• shield
• stronghold
• surrebuttal
• surrebutter
• surrejoinder
• wall
• ward
• weaponry
• weapons
• weir
• work
• wrangling