ADJ
great, true | excessive, fanatical
crusading, missionary, radical, reforming, religious, revolutionary
She approached her new job with a missionary zeal to help underprivileged children learn to read.
VERB + ZEAL
burn with, have
She has great zeal for helping children learn to read in her community.
demonstrate, show
PREP
with ~
He attacked the new project with such zeal that he finished it in just two days.
~ for
His zeal for learning new languages impressed everyone at the international school.
~ in
She showed great zeal in learning French and practiced every single day.
PHRASES
a lack of zeal