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 lengthening deployments come as Ukrainian commanders in other units have warned of personnel issues, acknowledging that the army will never match the manpower of Russia’s far larger military force. —Daria Tarasova-Markina, CNN Money, 20 Apr. 2026

If demand rises faster than infrastructure can be approved and built, reliability erodes, reserve margins thin, queues lengthen, delays compound, costs rise, and strategic directives become harder to realize. —Dan Romito, The Washington Examiner, 19 Apr. 2026

Cuts to federal Medi-Cal financing will destabilize public hospitals, lengthening emergency room waits and reducing services. —Susan Ellenberg, Mercury News, 15 Apr. 2026

If gardeners and farmers allowed the scapes to grow all season, the plant would squander energy to lengthen the stem and flower, and the resulting garlic bulb would be smaller and far less flavorful. —Karla Walsh, Better Homes & Gardens, 14 Apr. 2026