Synonyms of lengthen

lengthen

verb

ˈleŋ(k)-thən 

as in to extend

to make longer

I had to lengthen the handle of the paint roller in order to reach the top of the wall

Synonyms & Similar Words

• extend
• prolong
• increase
• stretch
• elongate
• protract
• expand
• drag (out)
• draw out
• enlarge
• outstretch
• amplify
• attenuate
• thin

Antonyms & Near Antonyms

• shorten
• cut
• reduce
• curtail
• decrease
• cut back
• diminish
• lessen
• abridge
• abbreviate
• thicken

Synonym Chooser

How does the verb lengthen contrast with its synonyms?

Some common synonyms of lengthen are extend, prolong, and protract. While all these words mean "to draw out or add to so as to increase in length," extend and lengthen imply a drawing out in space or time but extend may also imply increase in width, scope, area, or range.

extend a vacation

extend welfare services

lengthen a skirt

lengthen the workweek

When might prolong be a better fit than lengthen?

While the synonyms prolong and lengthen are close in meaning, prolong suggests chiefly increase in duration especially beyond usual limits.

prolonged illness

How are the words protract and prolong related as synonyms of lengthen?

Protract adds to prolong implications of needlessness, vexation, or indefiniteness.

protracted litigation

Example Sentences

Recent Examples of lengthen

Hearing numerous appeals can lengthen the extradition process — lasting for years, rather than months, according to Brazil. — Bill Chappell, NPR, 27 Aug. 2026

The asymmetry can help visually lengthen and balance a round face. — Laura Solla, Vogue, 24 Aug. 2026

Levi’s 726 High-Rise Flare Jeans The flares on these Levi’s jeans start lower on the leg for a cleaner, lengthening line. — Michelle Rostamian, PEOPLE, 24 Aug. 2026

Its researchers later lengthened its legs to almost 3½ feet ahead of the games, according to broadcaster CCTV. — Reuters, USA Today, 22 Aug. 2026