Synonyms of security

security

noun

si-ˈkyu̇r-ə-tē 

1

as in defense

means or method of defending

measures taken to beef up our national security

Synonyms & Similar Words

• defense
• protection
• ammunition
• safeguard
• shield
• wall
• weapon
• guard
• screen
• armor
• ward
• armament
• cover
• aegis
• weaponry
• munitions
• buckler
• fortress
• stronghold
• arm
• fort
• palisade
• fastness

Antonyms & Near Antonyms

• attack
• assault
• offense
• aggression
• offensive

2

as in guarantee

something given or held to assure that the giver will keep a promise

their house will serve as security for the loan

Synonyms & Similar Words

• guarantee
• pledge
• promise
• assurance
• guaranty
• gage
• pawn
• deposit
• bond
• bail
• down payment
• contract
• warranty
• surety
• commitment
• oath
• earnest
• covenant
• compact
• recognizance
• word
• handsel
• troth

3

as in safety

the state of not being exposed to danger

after the burglaries, police presence in the neighborhood was enhanced to give residents a stronger sense of security

Synonyms & Similar Words

• safety
• protection
• defense
• safeness
• shelter
• refuge
• shield
• guardianship
• safeguard
• asylum
• screen
• ward
• guard
• aegis
• retreat
• inviolability
• harbor
• invulnerability
• cover
• invincibility
• haven
• impregnability
• invincibleness
• impregnableness
• inviolableness
• invulnerableness

Antonyms & Near Antonyms

• danger
• risk
• threat
• trouble
• distress
• jeopardy
• peril
• hazard
• instability
• endangerment
• precariousness
• vulnerability
• imperilment
• liability
• exposure
• openness
• susceptibility
• harm's way
• violability
• vulnerableness
• susceptibleness

Example Sentences

Recent Examples of security

Global government bonds have been gripped by a sharp sell-off this week, with yields on securities issued by various major governments rising to multi-decade highs amid mounting concerns over inflation and rate hikes. — Chloe Taylor, CNBC, 4 Sep. 2026

Instead, security is more a matter of tracking fuel and keeping reactor spaces secure from not only physical but cyber attacks. — New Atlas, 4 Sep. 2026

Desalination is becoming increasingly popular, especially as the climate crisis drives more severe heat and drought, undermining water security. — Laura Paddison, CNN Money, 4 Sep. 2026

There are some things manufacturers can keep private, including trade secrets, source code and certain information that could put a device’s security at risk. — Tiffani Jackson, Fort Worth Star-Telegram, 4 Sep. 2026