cinder block vs clinker block

cinder block and clinker block both are nouns.

Word	Noun	Adjective	Verb	Adverb
cinder block	Yes	No	No	No
clinker block	Yes	No	No	No

As nouns, cinder block and clinker block are synonyms defined as:

cinder block and clinker block: a light concrete building block made with cinder aggregate

Other synonyms of cinder block include breeze block.

cinder block (noun)	clinker block (noun)
a light concrete building block made with cinder aggregate	a light concrete building block made with cinder aggregate