13 Letter Words
phytotoxicity
33
psychotherapy
31
phototoxicity
30
pharyngoscopy
29
physiotherapy
29
picturesquely
29
psychobiology
29
psychohistory
29
palaeozoology
28
paradoxically
28
patronizingly
28
prejudicially
28
psychotically
28
phraseography
27
poikilothermy
27
psychosurgery
27
pterylography
27
pharmacognosy
26
plagiocephaly
26
polyphonously
26
prohibitively
26
prosopography
26
provocatively
26
pyramidically
26
pyretotherapy
26