Noun: contract
* This is the most common form. It refers to a legally binding agreement between two or more parties.
* Example: "We signed a contract for the new software."
Verb: contract
* This means to become smaller or tighter.
* Example: "The muscle contracted, causing pain."
* It can also mean to make a formal agreement.
* Example: "They contracted with a builder to renovate the house."
Adjective: contractual
* This describes something related to a contract.
* Example: "The contractual obligations were clearly outlined."
Let me know if you'd like more examples or explanations!