12-Letter Words Start with 'os'

There are 23 12-letter words that start with 'os'.

oscillations	oscillograms	oscillograph
oscilloscope	osmolalities	osmolarities
ossification	ostentations	ostentatious
osteoblastic	osteoclastic	osteogeneses
osteogenesis	osteological	osteologists
osteomalacia	osteopathies	osteoplastic
osteoporoses	osteoporosis	osteoporotic
osteosarcoma	ostracoderms

Note: These 23 12-letter words that start with 'os' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with ost, osm, osc, oss, ose, osi, osn, osp, osa.

3-letter words start with 'os' (1)
4-letter words start with 'os' (3)
5-letter words start with 'os' (5)
6-letter words start with 'os' (19)
7-letter words start with 'os' (36)
8-letter words start with 'os' (29)
9-letter words start with 'os' (36)
10-letter words start with 'os' (33)
11-letter words start with 'os' (25)
12-letter words start with 'os' (23)
13-letter words start with 'os' (10)
14-letter words start with 'os' (7)
15-letter words start with 'os' (4)