12-Letter Words Start with 'arch'

There are 16 12-letter words that start with 'arch'.

archdeaconry	archdiocesan	archdioceses
archdukedoms	archegoniate	archenterons
archeologies	archerfishes	archesporial
archesporium	archetypally	archetypical
archipelagic	archipelagos	architecture
archosaurian

Note: These 16 12-letter words that start with 'arch' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with archi, archa, arche, archd, archo, archb, archf, archn, archp, archr, archw, archl.

6-letter words start with 'arch' (6)
7-letter words start with 'arch' (12)
8-letter words start with 'arch' (16)
9-letter words start with 'arch' (24)
10-letter words start with 'arch' (22)
11-letter words start with 'arch' (17)
12-letter words start with 'arch' (16)
13-letter words start with 'arch' (12)
14-letter words start with 'arch' (8)
15-letter words start with 'arch' (4)