Synonyms of substandard in English:

substandard


See US English definition of substandard

See UK English definition of substandard

adjective

1‘children were being educated in substandard buildings’

SYNONYMS
inferior, second-rate, low-quality, low-grade, poor, poor-quality, inadequate, imperfect, faulty, defective, jerry-built, shoddy, shabby, crude, unsound, unacceptable, unsatisfactory, unworthy, disappointing
informal below par, not up to scratch, not up to snuff, tenth-rate, crummy, lousy
British informal duff, ropy, rubbish
US informal farkakte
vulgar slang crap, crappy
North American vulgar slang chickenshit