Pachycarpous (a.)
definition: Having the pericarp thick.

Pachycarpous is a 12 letter word that begins with a P and ends in an S

Pachydermata (n.)
definition: A group of hoofed mammals distinguished for the thickness of their skins
Including the elephant hippopotamus rhinoceros tapir horse and hog. It is now considered an artificial group.
Pachydermata is a 12 letter word that begins with a P and ends in an A

Pachydermoid (a.)
definition: Related to the pachyderms.

Pachydermoid is a 12 letter word that begins with a P and ends in a D

Pachyglossal (a.)
definition: Having a thick tongue; -- applied to a group of lizards (Pachyglossae)
Including the iguanas and agamas.
Pachyglossal is a 12 letter word that begins with a P and ends in an L

Pacification (n.)
definition: The act or process of pacifying
Or of making peace between parties at variance; reconciliation.
Pacification is a 12 letter word that begins with a P and ends in an N

Pacificatory (a.)
definition: Tending to make peace; conciliatory.

Pacificatory is a 12 letter word that begins with a P and ends in a Y

Paedobaptism (n.)
definition: Pedobaptism.

Paedobaptism is a 12 letter word that begins with a P and ends in an M

Paedogenesis (n.)
definition: Reproduction by young or larval animals.

Paedogenesis is a 12 letter word that begins with a P and ends in an S

Paedogenetic (a.)
definition: Producing young while in the immature or larval state; -- said of certain insects
Etc.
Paedogenetic is a 12 letter word that begins with a P and ends in a C

Palaetiology (n.)
definition: The science which explains
By the law of causation the past condition and changes of the earth.
Palaetiology is a 12 letter word that begins with a P and ends in a Y

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