re the
blossomed game
solo can be both a noun and a verb.
The plural of the noun is
solos, which is obviously not allowed.
According to the COD, however, the verb has three inflected forms -
soloing,
soloes (3rd person singular, present simple) and
soloed(preterite / past participle).
In the
blossomed game,
soloed was allowed (common), but
soloes got 'sorry, not known'.
radio is another word which behaves in the same way.
This was Alan's verdict on that:
https://theforum.lexigame.com/index.php?topic=2480.0