Synonyms and related words :
arrested, at a premium, callow, defective, deficient, embryonic, failing, hypoplastic, immature, in arrear, in arrears, in default, inadequate, incomplete, infant, lacking, missing, needing, out of print, out of season, out of stock, part, partial, patchy, rare, scant, scanty, scarce, scrappy, short, shy, sketchy, sparse, uncommon, underdeveloped, undeveloped, wanting