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

Originally built for Seabourn in the 1990s, this older ship was purchased by Windstar in 2015 and refurbished and lengthened in 2020. — Erica Silverstein, Travel + Leisure, 4 Aug. 2026

Most formulas offer the same benefits as the very best mascaras—increasing volume and density, lengthening and separating lashes, etc—and deliver results just as effectively. — Ariana Yaptangco, Glamour, 3 Aug. 2026

Then Golden State took control down the stretch, lengthening the lead early and scoring 29 points in the fourth to ensure a comfortable final five minutes. — Christian Babcock, Mercury News, 3 Aug. 2026

The high waist creates a leg-lengthening effect while the delicate straps and scoop neckline show off more of the shoulders and neck, balancing the longer length. — Better Homes & Gardens, 2 Aug. 2026