Word Unit: psepho-, pseph- + (Greek > Latin: pebble/pebbles, stone/stones; election; vote)
Word Unit: pseudo-, pseud- (Greek: false, deception, lying, untrue, counterfeit; used as a prefix)
Word Unit: Pseudoserendipity (coined and presented by Royston M. Roberts, PhD, Professor of Chemistry at the University of Texas, Austin; among many other achievements)
Word Unit: psi; Ψ, ψ + (Greek: the twenty-third letter of the Greek alphabet; Ψ, ψ)
Word Unit: psilo-, psil- + (Greek: bare, making bare, stripping; smooth, plain; mere, merely)
Word Unit: psitta- (Greek [psittakos-] > Latin [psittacinus-]: parrot)
Word Unit: Psoriasis: Getting to know more about it (a disease of the skin in which raised, rough, reddened areas appear, covered with fine silvery scales which cause aggravation)
Word Unit: psoro-, psor- + (Greek: itch, mange)

Cross references directly, or indirectly, involving the "skin": callus-; chorio-; cicatri- (scar); cori-; cuti-; hymen-; lepido- (scab, scale); papulo- (pimple); pustu- (blister, pimple); rhytid- (wrinkle); scabio- (mange, itchy); sebo- (grease, oil).

Word Unit: psych-, psycho-, -psyche, -psychic, -psychical, -psychically (Greek: mind, spirit, consciousness; mental processes; the human soul; breath of life; literally, "that which breathes" or "breathing")

Inter-related cross references, directly or indirectly, involving the "mind, mental" word units: anima-; anxi-; deliri-; hallucina-; menti-; moro-; noo-; nous; phreno-; thymo-2.

Word units related to breath and breathe: hal-; pneo-; pneumato-; pneumo-; spiro.

Word Unit: Psychoneurosis Types (psychoneurotic situations)
Word Unit: psychro-, psychr- (Greek: cold)

Cross references of word families that are related directly or indirectly to "winter, freezing, frost, and/or cold": algid- (cold, chilly); cheimo-, chimo- (winter, cold); crymo-, krymo- (cold, chill, frost); cryo-, kryo-; (cold, freezing); frigo-, frig- (cold, frost); gel-, gelati- (freeze, frost, congeal); hiber- (winter, wintry); pago- (cold, freezing); rhigo- (cold, frost; shiver).

Word Unit: psylli-, psyll- + (Greek > Latin: flea)
Word Unit: ptarmo-, ptarm- (Greek: sneeze, a sneezing)
Word Unit: pterido-, pterid- (Greek: fern [from pter[on], "feather, wing"])

Related "feather, feather-like; soft down, plumage" word units: penna-; pinni-, pin-; plum-, -plume; ptero-; ptilo-.

Word Unit: ptero-, pter-, -ptera, -pteron, -pteryx, -ptery, -pterous (Greek: feather; wing, winglike)

Related "feather, feather-like; soft down, plumage" word units: penna-; pinni-, pin-; plum-, -plume; pterido-; ptilo-.

Word Unit: pterygo-, pteryg- (Greek: wing)
Word Unit: ptilo-, ptil-, ptilono- + (Greek: feather [soft], down)

Related "feather, feather-like; soft down, plumage" word units: penna-; pinni-, pin-; plum-, -plume; pterido-; ptero-.

Word Unit: ptocho-, ptoch- (Greek: a person who crouches; than extended to a beggar, poor; paupers; modernized meanings: street people, homeless, vagrant, living in poverty)
Word Unit: ptomato-, ptomat-, pto-, -ptosia, -ptosis, -ptoma, -ptot- (Greek: fall, a falling down of an organ; drooping, sagging; corpse)
Word Unit: ptyalo-, ptyal-, ptya-, pty- + (Greek: spittle, salivia; salivary gland)

Other related saliva and/or spittle units: salivo-; sialo-; sput-.