An alternative to 'that' could be who or which depending on the circumstances.
Example:
The house that was red... OR The house which was red...
There was a man that... OR There was a man who...
Sometimes, the word 'that' can be left out all together.
Example:
A man, that walked his dog, lost his hat. OR A man, walking his dog, lost his hat.
Depending on your use of 'that', it can also be replaced by 'this'
Example:
Johnny saw a house on the beach. That house had no windows.
OR
Johnny saw a house on the beach. This house had no windows.
instead of being that
effective.
customize
Apothecary
end
defeated
Programme
sequential, ordered
applied, exercised
The other word which is widely used instead of doorknob is latch.
One alternative word that can be used instead of "they" is "them."
plainly, flatly, boring.