Find Synonyms

loco Synonyms

Another word for loco

Choosing another word for loco depends on context, so the 14 synonyms and similar words below are separated across 5 exact definitions and ranked by match strength.
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• adjective (Context 1)

Crazy, insane, or out of one's mind (used informally).

Usage Example

"The crowd went completely crazy when the home team scored the winning goal in the final seconds."

Strongest
crazy
mad
insane
nuts
Strong
bonkers
unhinged
loony
barmy

• noun (Context 2)

A railway locomotive engine (used informally).

Usage Example

"The heritage railway volunteers spent months restoring the vintage steam locomotive to working order."

Strongest
locomotive
Strong
engine

• noun (Context 3)

Any of various leguminous plants of the genera Astragalus and Oxytropis native to western North America that cause neurological poisoning in grazing livestock; locoweed.

Usage Example

"Ranchers carefully inspected the dry pasture to make sure their horses were not grazing on locoweed."

Strongest
locoweed

• noun (Context 4)

A chronic neurological disease in horses, cattle, and sheep caused by the ingestion of toxic locoweed plants.

Usage Example

"The veterinarian recognized the erratic gait and weight loss in the herd as classic signs of locoism."

Strongest
locoism

• verb (Context 5)

To poison with locoweed or drive crazy (especially of livestock).

Usage Example

"Several cattle were locoed after wandering into a patch of toxic milkvetch during the drought."

Strong
madden
derange

Opposites of loco

The opposite of loco shifts depending on context. Common opposites include:

sane
rational
sensible
lucid
balanced
See all opposites of loco

• Nearby Words

locksmithing
lockstep
lockup
loco
locomotion
locomotive
locoweed

Cite this Entry

Wordmom. (2026). Synonyms for Loco. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/synonyms/loco
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