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

The season has lengthened by 19 days on average in the southeast specifically, creating a 136 day window where there are no freezes and plants are able to grow and pollinate. —Irene Wright, USA Today, 12 Mar. 2026

This time around, Verlander can slot in between RHPs Jack Flaherty and Casey Mize in lengthening out one of the game’s best rotations. —Jeff Sanders, San Diego Union-Tribune, 11 Mar. 2026

The semi-sheer knit crochet top layers seamlessly over a tank for depth and contrast without losing coziness, while the gently high-rise, wide-leg pants add a leg-lengthening effect that makes the whole look feel polished and on-trend. —Annie Blackman, InStyle, 11 Mar. 2026

The law phases out several affordable repayment plans and lengthens terms for others. —Annie Nova,kamaron McNair, CNBC, 10 Mar. 2026