"One" is a relivitive word. It can mean more than one thing. It can be used in a way that is implied as to say 1 as in the number, but can also be used in ways that can be cosidered 'unity'. Some words that may subtitiute's are unity, all, and together.
myself, I, me
Off ones rocker, mental midget
Hairdressing.
the simplists ones are: i adore i love
Another word for didn't would be don't, wouldn't, couldn't. Though these are probably the only ones.
investigationtestsearchtrialprobeexaminationattemptthe ones in bold i recommend!!!
Tress and strand are the ones I can think of at THISmoment.
compromise, agreement and ceasefire are all good ones
Some, or desperse..sorry the other ones where another word for.:)
possess, torment are the ones i can think of
plagiarism
Emigrate.