Prickly plants are a type of plant that have sharp spines or thorns, which can be used for protection from predators. The crossword solutions for the term 'prickly plant' include THORN (5 letters), THISTLE (7 letters), TEASEL (6 letters), CACTUS (6 letters), ACANTHUS (8 letters), BRIER (5 letters), NETTLE (6 letters), and BRIAR (5 letters). All of these plants have sharp spines or thorns, which can be used to protect them from predators.