Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun petitioner

2 senses of petitioner

Sense 1
petitioner, suppliant, supplicant, requester -- (one praying humbly for something; "a suppliant for her favors")
       => applicant, applier -- (a person who requests or seeks something such as assistance or employment or admission)

Sense 2
suer, petitioner -- (someone who petitions a court for redress of a grievance or recovery of a right)
       => plaintiff, complainant -- (a person who brings an action in a court of law)