is perhaps the most important is perhaps the most popular is perhaps what is perilous is period is periodic is periodically is peripheral is perishable is perishing is perjury is permanent is permanently is permanently attached is permanently connected is permeable is permeated is permeating is permissible is permission is permitted is permitted as is permitted by law is permitted only is permitted to use is permitting is pernicious is perpendicular is perpendicular to the axis is perpendicular to the longitudinal is perpendicular to the plane is perpetrated is perpetual is perpetually is perpetuated is perpetuating is perplexed is perplexing is perry is persecuted is persecuting is persecution is perseverance is persian is persistence is persistent is persistently is persisting is person is persona is personal is personal data is personal information is personalised is personality is personalization is personalized is personally is personally responsible is personified is perspective is persuasion is persuasive is pertinent is perturbed is peru is pervaded is pervasive is perverse is pessimistic is pet is pete is peter is peter parker is petey is petite is petitioning is petra is petrified is petroleum is petty is peyton is ph is ph dependent is phantom is pharaoh is pharmaceutical is pharmacologically is phase is phased is phasing is phenol is phenomenal is phenyl is phenylene is phil is philadelphia is philip is philippe