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

Analysts also raised concerns about the strength of the 10-year service agreement, suggesting it could be lengthened to hold data center companies accountable for long-term infrastructure costs. —Francesca Pica, jsonline.com, 25 Mar. 2026

Trouble is, the Legislature has had no trouble finding excuses to enact and renew an ever-lengthening list of exemptions. —Martin Dyckman, The Orlando Sentinel, 22 Mar. 2026

This gin sour lengthened with soda water is a simple yet tasty delight of a drink. —Jeremy Repanich, Robb Report, 21 Mar. 2026

Wildfire risks The same forces constraining western water supplies could also set the stage for the West's wildfire season, which has lengthened over the last few decades with rising temperatures and intensifying drought. —Emily Mae Czachor, CBS News, 21 Mar. 2026