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

Her medical furlough was initially to be for three weeks, but her time out of prison lengthened, possibly on account of activists and Western powers pushing Iran to keep her free. —Jon Gambrell, Los Angeles Times, 8 Feb. 2026

Why People Love It During its prime trending era in the 1950s, as well as into modern times, boatneck shirts are most known for being flattering on your form—skimming across your collarbones in a lengthening, elegant way. —Kaitlyn Yarborough, Southern Living, 6 Feb. 2026

Spanx AirEssentials Wide-leg Pant These mid-rise, wide-leg pants offer a relaxed fit that creates a leg-lengthening effect. —Caroline Hughes, Travel + Leisure, 4 Feb. 2026

The vegan formula tubes, lengthens, and volumizes by coating each lash in lightweight fibers and film-forming polymers for striking definition. —Conçetta Ciarlo, Vogue, 3 Feb. 2026