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

2 senses of participant

Sense 1
participant -- (someone who takes part in an activity)
       => associate -- (a person who joins with others in some activity or endeavor; "he had to consult his associate before continuing")

Sense 2
player, participant -- (a person who participates in or is skilled at some game)
       => contestant -- (a person who participates in competitions)