1. (noun) spine, thorn, prickle, pricker, sticker, spikelet
a small sharp-pointed tip resembling a spike on a stem or leaf
Synonyms: irritant, sticker, spikelet, stumper, prickle, pricker, bradawl, paster, thorn, gummed label, spinal column, spur, back, poser, backbone, acantha, spine, toughie, rachis, dagger, vertebral column
2. (noun) gummed label, sticker, paster
an adhesive label
Synonyms: thorn, spikelet, paster, spine, pricker, poser, dagger, toughie, stumper, prickle, gummed label, sticker
3. (noun) poser, stumper, toughie, sticker
a particularly difficult or baffling question or problem
Synonyms: dagger, hoodlum, toughie, spikelet, sticker, hood, stumper, prickle, pricker, paster, gummed label, thorn, goon, strong-armer, poser, tough, model, punk, thug, spine, poseur
4. (noun) dagger, sticker
a short knife with a pointed blade used for piercing or stabbing
Synonyms: thorn, spikelet, paster, spine, pricker, poser, dagger, sticker, toughie, stumper, prickle, gummed label, obelisk
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Synonyms for sticker 
