tanker vs tanker truck

tanker and tanker truck both are nouns.

Word	Noun	Adjective	Verb	Adverb
tanker	Yes	No	No	No
tanker truck	Yes	No	No	No

As nouns, tanker and tanker truck are synonyms defined as:

tanker and tanker truck: a motor vehicle designed to carry liquefied loads, dry bulk cargo or gases on roads.

Other synonyms of tanker include tank truck.

tanker (noun)	tanker truck (noun)
a cargo ship designed to carry crude oil in bulk	a motor vehicle designed to carry liquefied loads, dry bulk cargo or gases on roads.
a motor vehicle designed to carry liquefied loads, dry bulk cargo or gases on roads.
a soldier who drives a tank