THESAURUS
lengthen
add to, aggrandize, amplify, augment, boost, broaden, build, build up, continue, dawdle, drag out, draw, draw out, dwell on, elongate, enlarge, exalt, expand, extend, fatten, fill out, hike, hike up, hold, increase, inflate, jack up, jump up, keep, keep alive, keep going, keep up,
lengthen out, let out, linger on, maintain, maximize, parlay, perpetuate, preserve, procrastinate, produce, prolong, prolongate, protract, pull, put up, pyramid, raise, retain, spin out, strain, stretch, stretch out, string out, sustain, tauten, temporize, tense, thicken, tighten, up
ROGET THESAURUS
lengthen
Length
VB
be long, stretch out, sprawl, extend to, reach to, stretch to, make a long arm, drag its slow length along, render long,
lengthen, extend, elongate, stretch, prolong, produce, protract, let out, draw out, spin out, drawl, enfilade, look along, view in perspective, distend (expand).