TOEIC Link Part 5: luxuriant versus luxurious
Luxuriant and luxurious grow from the same root and differ by only a few letters, but they point in different directions. Luxuriant describes something growing thickly, lushly, and in abundance — the emphasis is on rich, profuse growth. Luxurious describes something marked by luxury, comfort, and expense — the emphasis is on costly elegance and ease. Part 5 rewards you for asking whether the blank describes lush abundance or expensive comfort. For the wider set of look-alike traps, start with the commonly confused word pairs master index.
The core rule: lush growth versus costly comfort
- luxuriant (adjective) = growing thickly and abundantly; lush, profuse. The resort's luxuriant gardens surround the terrace. It answers is it growing richly and densely? Anchor it with the idea of -ant plants — much of what is luxuriant is vegetation, hair, or foliage that flourishes.
- luxurious (adjective) = characterized by luxury; richly comfortable, elegant, and expensive. The suite offers luxurious furnishings and a spa. It answers is it costly and comfortable? Anchor it with luxury itself — the word rates something as a high-end, indulgent experience.
A quick anchor: luxuriant = lush and abundant; luxurious = richly comfortable. One describes profuse growth, the other describes expensive comfort.
Why Part 5 likes this pair
The two words share a root and sit close in spelling and sound, so the wrong option passes a quick glance. The item is decided by which idea the sentence supports: dense, flourishing growth points to luxuriant, while expensive comfort and elegance point to luxurious.
The hotel's __ rooftop garden draws guests who want greenery in the city center.
The blank describes thick, abundant growth, so it needs luxuriant.
The refurbished suites feature __ bedding and marble bathrooms.
The blank describes costly comfort and elegance, so it needs luxurious.
Spotting the clue
Check whether the blank describes lush growth or costly comfort:
- Is the word describing something growing thickly or flourishing? → choose luxuriant (luxuriant foliage, luxuriant hair, a luxuriant lawn).
- Is the word describing costly comfort, elegance, or indulgence? → choose luxurious (a luxurious hotel, luxurious fabrics, a luxurious lifestyle).
A quick test: can you replace the word with "lush" or "abundant"? Then it is luxuriant. Can you replace it with "opulent" or "richly comfortable"? Then it is luxurious. In TOEIC business scenarios, luxuriant tends to appear in descriptions of gardens, landscaping, or foliage at hotels and venues, while luxurious shows up in marketing for premium rooms, amenities, cars, and services. Watch what is being described: living, growing things lean toward luxuriant; products and experiences priced as high-end lean toward luxurious. For more pairs where a shared root splits into two senses, see the business and finance confusable pairs study guide. Another chance-and-outcome trap worth reviewing next is fortuitous versus fortunate.