One-Word Substitutions 📚📚📚 Ambiguous – Something that can be understood in more than one way. Celibate – One who abstains from marriage and sexual relations. Bilingual – A person who speaks two languages fluently. Annual – Happening once a year. Biennial – Happening every two years. Centenary – A 100th anniversary. Contagious – A disease that spreads by contact. Insoluble – A problem that cannot be solved. Incurable – A disease that cannot be cured. Mercenary – A person who works only for money. Glutton – A person who eats too much. Insomnia – Inability to sleep. Soliloquy – Speaking one’s thoughts aloud when alone. Monologue – A long speech by one person in a group. Panacea – A remedy for all diseases. Nostalgia – A sentimental longing for the past. Calligraphy – The art of beautiful handwriting. Expatriate – A person living in a country not their own. Maniac – A person with an obsessive enthusiasm for something. Embezzlement – Theft or misappropriation of funds placed in one's trust.