"recurrent" - key terms from Wikipedia

persistent or recurrent	feelings
positive recurrent
recurrent
recurrent	abdominal pain
recurrent	aphthous
recurrent	artery
recurrent	basal cell
recurrent	corneal
recurrent	decay
recurrent	depression
recurrent	depressive disorder
recurrent	disc herniation
recurrent	dreams
recurrent	laryngeal
recurrent	laryngeal nerve
recurrent	nerve
recurrent	neural network
recurrent	parent
recurrent	process
recurrent	rule
recurrent	tonsillitis
recurrent	urge or behavior
simple recurrent	network
ulnar recurrent	artery