stumbling-block, n. [difficulty], [obstruction], [hindrance], [barrier], stumbling-stone.
stump, v. (Colloq.) [dare], [challenge], [nonplus].
stun, v. [overcome], [stupefy], [dumfound], [bewilder].
stunning, a. [overpowering], stupefying; [astonishing], [striking], [fine].
stunt, v. [dwarf], atrophy.
stunted, a. dwarfed, atrophied, [undeveloped], [scrubby], undersized.
stupefier, n. stupefacient, [narcotic], [opiate].
stupefy, v. [dull], [benumb], hebetate, [blunt], besot.
stupid, a. [dull], [stolid], obtuse, [sluggish], inept, bovine, beef-witted, beetle-headed, besotted, fat-witted, doltish, undiscerning; prosaic, [vapid], [prosy], [humdrum], uninspiring [tame]; lethargic, comatose, stupefied, [torpid], [insensible]. Antonyms: [shrewd], [sharp], [apt], [spirited], [lively], [exciting], interesting.
stupor, a. [lethargy], [insensibility], [unconsciousness], narcoma, torpor, coma.