Synonyms of the word

tauten

• v. (transitive) To make taut.
• v. (ergative) To become taut.

fasten

• v. To attach or connect in a secure manner.
• v. To cause to take close effect; to make to tell; to land.

firm

• n. (Britain, business) A business partnership; the name under which it trades.
• n. (business, economics) A business enterprise, however organized.
• n. (slang) A criminal gang, especially based around football hooliganism.
• adj. steadfast, secure, hard (in position).
• adj. fixed (in opinion).
• adj. solid, rigid (material state).
• v. (transitive) To make firm or strong; fix securely.
• v. (transitive) To make compact or resistant to pressure; solidify.
• v. (intransitive) To become firm; stabilise.
• v. (intransitive) To improve after decline.
• v. (intransitive, Australia) To shorten (of betting odds).
• v. (transitive, Britain, slang) To select (a higher education institution) as one's preferred choice, so…

tighten

• v. (transitive) To make tighter.
• v. (intransitive) To become tighter.
• v. (economics) To make money harder to borrow or obtain.
• v. (economics) To raise short-term interest rates.