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

The opening scene in the annex — when Hamnet first notices that his twin has taken ill — recurs about halfway through the play, an instance of déjà vu. —Rhoda Feng, Vulture, 23 Mar. 2026

These include the Anixter office building at 2301 Patriot Boulevard, Anixter’s annex at 2591 Compass Road, and the original Astellas office buildings at 2375 Waterview Drive near I-294 and Willow Road, the village said. —Jennifer Johnson, Chicago Tribune, 9 Mar. 2026

Verb

The City Council voted 5-1 to annex farmland near Idaho 16 and Chinden Boulevard for North Meridian Fields, a development with about 25 acres of commercial space and up to 382 single-family homes. —Idaho Statesman, 5 May 2026

Israel’s far-right finance minister Bezalel Smotrich, one of several key cabinet ministers with close ties in the settler community, has been explicit about his goal of annexing the West Bank and supporting settler expansion. —Molly Hunter, NBC news, 2 May 2026