Synonyms of lengthen in English:

lengthen


See definition of lengthen

verb

1‘he followed her, lengthening his stride to keep up’

SYNONYMS
elongate, make longer, stretch out, extend
expand, widen, broaden, enlarge
ANTONYMS

shorten

2‘they flower in the spring when the days are lengthening’

SYNONYMS
grow longer, get longer, draw out, stretch
ANTONYMS

contract, decrease

3‘you'll need to lengthen the cooking time’

SYNONYMS
prolong, make longer, increase, extend, expand, protract, stretch out, draw out, drag out, spin out
ANTONYMS

curtail, truncate