15-Letter Words Start with 'or'

There are 11 15-letter words that start with 'or'.

orchestrational	organochlorines
organomercurial	organometallics
organophosphate	orientationally
orthodontically	orthogonalities
orthogonalizing	orthophosphates
orthopsychiatry

Note: These 11 15-letter words that start with 'or' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with org, ort, ori, ora, ord, orc, orn, oro, orp, orb, ore, orr, orl, orm, orf, ory, orz, ors.

3-letter words start with 'or' (6)
4-letter words start with 'or' (14)
5-letter words start with 'or' (24)
6-letter words start with 'or' (53)
7-letter words start with 'or' (63)
8-letter words start with 'or' (73)
9-letter words start with 'or' (68)
10-letter words start with 'or' (73)
11-letter words start with 'or' (45)
12-letter words start with 'or' (46)
13-letter words start with 'or' (30)
14-letter words start with 'or' (17)
15-letter words start with 'or' (11)