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

Experts recommend pairing them with tights and shoes in a similar color to visually lengthen the legs. — Kelsey Stewart, Glamour, 16 Sep. 2026

So Chimedza chose not to move forward with lengthening his limbs, though confidence in that choice did not arrive immediately. — Ashley Vega, PEOPLE, 15 Sep. 2026

The leg-lengthening silhouette looks especially good with ballet heels or chunky sneakers for an extra vertical boost. — Annie Blackman, InStyle, 12 Sep. 2026

As the researchers lengthened the fall, this phase increased—a behavior in line with the theory. — Jacek Krywko, ArsTechnica, 11 Sep. 2026