13-Letter Words Start with 'radio'

There are 14 13-letter words that start with 'radio'.

radioactively	radioactivity
radiobiologic	radiochemical
radiochemists	radioelements
radiographies	radiographing
radioisotopes	radioisotopic
radiolabeling	radiolabelled
radionuclides	radiothoriums

Note: These 14 13-letter words that start with 'radio' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with radiol, radiot, radiog, radiom, radioa, radioc, radiop, radiob, radios, radioe, radioi, radion.

6-letter words start with 'radio' (1)
7-letter words start with 'radio' (1)
8-letter words start with 'radio' (3)
9-letter words start with 'radio' (3)
10-letter words start with 'radio' (14)
11-letter words start with 'radio' (15)
12-letter words start with 'radio' (19)
13-letter words start with 'radio' (14)
14-letter words start with 'radio' (16)
15-letter words start with 'radio' (15)