eighteen-wheeler

[ ey-teen-hwee-ler, -wee- ]
/ ˈeɪ tinˈʰwi lər, -ˈwi- /

noun

a large tractor-trailer, usually having ten wheels on the cab and eight on the trailer.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019