mainstay
noun/ˈmeɪnˌsteɪ/
Frequency rank: #12,283 of 20,003 in the WORDED list (wordfreq data)
Meaning
the most important part or chief support of something.

Example sentence
Tourism has long been the mainstay of the island's economy.
Synonyms & related words
More words in ranks 12,201–12,300
- jestA joke or playful remark; something said or done to cause amusement.
- leakyallowing liquid or gas to pass through unintended holes or cracks.
- libidosexual drive or desire; psychic energy associated with instinctual urges.
- lynxa wild cat with tufted ears, a short tail, and spotted fur, found in forests of North America, Europe, and Asia.
- mainlineto inject a drug directly into a vein.
- mannequinA life-sized dummy used to display clothes in a store.
- marketableable to be sold easily; attractive to buyers or employers.
- masterfulperformed or done with great skill and confidence; showing mastery.
- maximalas great, large, or intense as possible; reaching the highest possible degree.
- mimeto use gestures and body movements to express something without speaking.