Competitor :: Competitor (n.) One who seeks what another seeks, or claims what another claims; one who competes; a rival..
 
	
	Competitory :: Competitory (a.) Acting in competition; competing; rival.
 
	Petitor :: Petitor (n.) One who seeks or asks; a seeker; an applicant.
 
	Petitory :: Petitory (a.) Petitioning; soliciting; supplicating.