different oxygen contents
different oxygen partial pressures
different oxygen tensions
different packing modes
different pain syndromes
different pairs
different panels
different paradigms
different parameters
different parasites
different particle sizes
different parties
different partners
different parts
different passages

different patch types
different pathogenesis
different pathogens
different pathological conditions
different pathologies
different pathways
different patient groups
different patient populations
different patients
different patterns
different people
different peptides
different percentages
different perceptions
different performances
different periodicities

different periods
different peroxides
different perspectives
different pH
different pH conditions
different pH levels
different pH ranges
different pH values
different phases
different phenomena
different phenotypes
different photoperiods
different phyla
different physical
different physical properties
different physicochemical properties

different physiological
different physiological conditions
different physiology
different pI
different picture
different pig breeds
different places
different plant organs
different plant parts
different plant species
different plants
different platforms
different plots
different points
different polarity
different policies

different political
different poly
different polymers
different polymorphs
different pools
different population groups
different population sizes
different populations
different pore sizes
different porosities
different portions