Cactuses-Cacti | Commonly Confused Words

Cactuses

Plants with thick, fleshy stems that store water and often have spines instead of leaves.

This word has no antonyms

/ˈkæktaɪ/

Plants that usually grow in dry areas, have thick stems storing water, and spines instead of leaves

Anna has cacti in her house.

This word has no antonyms

Both cactuses and cacti are plural forms of the word cactus.
Cactuses is commonly used in American English, while cacti is more frequently used in British English or scientific contexts.
Remember the rule: -us words originating from Latin often have plural forms ending in -i (like alumnus to alumni).
Cacti might sound more formal or technical, whereas cactuses sounds more casual.
Both words are correct, so the choice often depends on personal or regional preference.