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acanthoid
acanthous
acicular
acuate
aculeate
aculeiform
acuminate
acute
barbed
cone-shaped
cornuted
cusped
cuspidate
hispid
horned
horny
mucronate
needle-pointed
needle-sharp
pointed
pronged
sharp-pointed
spiculate
spiked
spiky
spined
spinous
spiny
taper
tapering
tined
toothed
unbated
papered