Synonyms of the word

chronic

• adj. Of a problem, that continues over an extended period of time.
• adj. (medicine) Prolonged or slow to heal.
• adj. Of a person, suffering from an affliction that is prolonged or slow to heal.
• adj. Inveterate or habitual.
• adj. (slang) Very bad, awful.
• adj. (informal) Extremely serious.
• adj. (slang) Good, great, as in "wicked".
• n. (slang) Marijuana, typically of high quality.
• n. (medicine) A condition of extended duration, either continuous or marked by frequent recurrence. Sometimes…
• n. A person who is chronic, such as a criminal reoffender or a person with chronic disease.

degenerative

• adj. Characterized by or causing degeneration.

prolonged

• adj. lengthy in duration; extended; protracted.
• v. simple past tense and past participle of prolong.