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

At the center lies a luxury villa with five large suites that can sleep up to 10 guests, along with an independent annex that can accommodate another two guests. — Rachel Cormack, Robb Report, 18 Aug. 2026

It is currently used as an annex for the DOC Training Academy and a wellness center for Correction staff. — Colin Mixson, New York Daily News, 15 Aug. 2026

Verb

Minneola City Councilman David Yeager’s efforts to annex his new home into the city earlier this summer sparked a nasty debate on the council that led to two members being censured last week for incivility. — James Wilkins, The Orlando Sentinel, 27 Aug. 2026

The residents launched their recall effort following contentious meetings over annexing the 2,000 acres into Granbury and zoning the land for industrial use despite vehement opposition from residents. — Elizabeth Campbell, Fort Worth Star-Telegram, 27 Aug. 2026