I don't want to interrupt your dialogue, teenie & ixion, but I have answers for 4 others that seem to work OK without using that theme word in any way, namely:
1,3, 8 & 19 down.
Please confirm you are sure they also (!) work using that word (etc). Obviously your answers (assuming they are indeed different ones from mine) would make a more satisfactory whole i.e. if there are no exceptions to the rule. All seems very odd to me, but you're probably right --- I just need a bit of gentle persuasion!