15-Letter Words Start with 'photo'

There are 39 15-letter words that start with 'photo'.

photoautotrophs	photobiological
photobiologists	photochemically
photoconductive	photodegradable
photodissociate	photoduplicated
photoduplicates	photoelectronic
photoengravings	photoexcitation
photofinishings	photogeological
photogeologists	photogrammetric
photoinductions	photoionization
photojournalism	photojournalist
photolithograph	photomechanical
photometrically	photomicrograph
photomultiplier	photooxidations
photoperiodisms	photoproduction
photoreceptions	photoreductions
photosensitized	photosensitizer
photosensitizes	photosynthesize
phototactically	phototelegraphy
phototoxicities	phototropically
phototypesetter

Note: These 39 15-letter words that start with 'photo' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with photos, photoc, photog, photop, photom, photot, photoe, photor, photod, photoi, photol, photof, photoo, photob, photon, photok, photoa, photoj, photov.

6-letter words start with 'photo' (3)
7-letter words start with 'photo' (3)
8-letter words start with 'photo' (6)
9-letter words start with 'photo' (16)
10-letter words start with 'photo' (27)
11-letter words start with 'photo' (29)
12-letter words start with 'photo' (47)
13-letter words start with 'photo' (41)
14-letter words start with 'photo' (37)
15-letter words start with 'photo' (39)