1The zealous advocacy of environmental groups has led to significant changes in government policy.
2Was she a zealous supporter of the new management, or did she have reservations?
3The company's zealous pursuit of innovation has resulted in numerous groundbreaking products.
4Try not to be too zealous in your criticism, as it may discourage others from contributing.
5There is a fine line between being zealous about a cause and becoming overly aggressive in its promotion.