Comparative form of thorny: more thorny(adjective)
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Use "thornier" in a sentence
"Far thornier is the fact that this is a commercial transaction from which parents desperately, if selectively, want emotional results."
"The president wants a bill on his desk this year to take advantage of the momentum of his new administration and avoid the thornier political climate of mid-term congressional elections in 2010."
"These issues are going to get even thornier as technology puts pressure on the entities who depend on the old "windowing" system—which staggers a movie's release through avenues like theaters, DVD and television, to maximize the profitability of each."