Synonyms of annex

annex 1 of 2

noun

ˈa-ˌneks 

as in addition

a smaller structure added to a main building

a new annex that will serve as the permanent home for the school library

Synonyms & Similar Words

• addition
• extension
• penthouse
• wing
• ell
• arm

annex

2 of 2

verb

ə-ˈneks 

as in to add

to join (something) to a mass, quantity, or number so as to bring about an overall increase

plans to annex the supply room so as to make the classroom bigger

Synonyms & Similar Words

• add
• adjoin
• append
• tack (on)
• expand
• introduce
• subjoin
• attach
• insert
• affix
• augment
• compound
• increase
• tie
• extend
• supplement
• enlarge
• inject
• tag
• complement
• infuse
• supply
• escalate
• enforce
• enhance
• graft
• reinforce
• prolong
• amplify
• multiply
• intensify
• fasten
• hitch
• swell (up)
• lengthen
• fix
• elongate
• boost
• aggrandize
• beef (up)
• interfuse
• heighten
• protract
• maximize
• strengthen
• raise
• magnify

Antonyms & Near Antonyms

• separate
• remove
• deduct
• subtract
• take off
• abate
• detach
• cut
• disconnect
• reduce
• knock off
• contract
• excise
• lower
• sever
• bate
• decrease
• diminish
• amputate
• lessen
• curtail
• abridge
• unfasten
• shorten
• disjoin
• cut back
• lop (off)
• abbreviate
• compress
• condense
• constrict
• retrench

Example Sentences

Recent Examples of annex

Noun

Parents will find the place secure and their children well looked after, and though dining is slightly limited, the activities and beachside annex will also be appreciated. — Condé Nast, Condé Nast Traveler, 15 July 2026

The security annex was not made public. — Bassem Mroue, Los Angeles Times, 27 June 2026

Verb

Baun said that City Council previously identified this area back in the 2000s when council began annexing the BLM land and planned to annex the Avimor development, then called Spring Valley. — Noah Daly july 24, Idaho Statesman, 24 July 2026

The Russian Olympic Committee had been admitting local sports organizations in territories of Ukraine that Russia annexed in 2022 – Donetsk, Luhansk, Kherson, and Zaporizhzhia – under the Russian constitution. — Fred Weir, Christian Science Monitor, 23 July 2026