There aren't too many:
ectoderm ectomorph ectopic ectoplasm ectoplasmatic ectoplasmic
Words that begin with the prefix "ie" include "ielectric," "iefficient," and "iempower."
ectoplasm ectotherm
Some words that begin with the prefix "ambu" include ambulance, ambulatory, and ambulate.
The prefix ecto- means outside or external. It is commonly used in scientific terms to denote something situated on the outer surface or beyond a structure.
incredible
insert
outside
Some words that begin with the prefix "aug" include: augment, august, augur, and augury.
Words that begin with the prefix "ir" and mean "not" include irregular, irresponsible, irrelevant, and irrational.
Some words are:OfficeOfficiencyOffensiveOffenseOf
Exo as in exocrine organ (i.e. Pancreas)
carnivorous