There were a lot of o’s I could have written about. Was there an overwhelming number? No, otherwise there would be no post but I think many of us get overwhelmed at all sorts of things. I wanted to be optimistic in my writings.
Occasional obstructive obstetricians are offenceless.
Officially the octahedral oil painting was obsolescent to the optometrist.
The observational skills of the orang-utang (yes this spelling is in my dictionary) are obligatory to oceanography.
I could go on with my obiterdictums.
Lots more long o words:
Octagonally
Occidental
Observatory
Objectionably
Onomatopoeia
I do hope you’re not objurgatory of this post… (the spell checker’s having a field day with this one but they’re all in my dictionary so they’re not getting changed…)
o ver whelm ing
‘too many, too great, or too much to be resisted;’
ob i ter dic tum
‘incidental statement.’
ob jur ga to ry
‘Vehemently reproachful; upbraiding; berating.’
overwhelming o’s on A-Zchallenge
lynnelives 
Very original post. I have found it a difficult letter to blog about within my theme also U is horrible too.
WordPress won’t let me sign in with blogger so blog is
http://www.cassam-isanyonethere.blogspot.com
Thanks Anne. Inspiration’s amazing isn’t it? How some just rush out of you and others you struggle with. T’s been my hardest and last to write.. I’ve finally settled on the word, only minutes ago.