he knew the stock was a speculation when he bought it
The board has noted the recent press speculation on this subject.
When word got out that the diamond was missing, there was much speculation among the townsfolk as to who the thief could be.
you can't
The existence of life on other planets has been a topic of speculation for decades.
You just did use the word colonize in a sentence.
Since that is not a word I would not attempt to use it in a sentence.
how would you use the word finished in a command sentence
1. you did just use that word in a sentence 2. if a doctor would use the word tumor in a sentence they would probably say "we need to remove the tumor from this persons body."
The word mores is not a word.
This justifies the use of this word, in a sentence.
how to use the word zemblanity in a sentence
the book on adventure was flummoxed that's how i would use it in a sentence