A decongestant is a medication used to relieve NASAL congestion caused by allergies, colds, or other respiratory illnesses. The two crossword solutions for the term decongestant are NASAL and SPRAY. NASAL decongestants come in the form of a SPRAY, which is sprayed into the nostrils to reduce swelling and congestion. NASAL sprays can also be used to treat sinus infections and other conditions. Decongestants can also be taken orally in the form of tablets or capsules.