scribing block vs surface gauge

scribing block and surface gauge both are nouns.

Word	Noun	Adjective	Verb	Adverb
scribing block	Yes	No	No	No
surface gauge	Yes	No	No	No

As nouns, scribing block and surface gauge are synonyms defined as:

scribing block and surface gauge: gauge consisting of a scriber mounted on an adjustable stand; used to test the accuracy of plane surfaces

Other synonyms of scribing block include surface gage.

scribing block (noun)	surface gauge (noun)
gauge consisting of a scriber mounted on an adjustable stand; used to test the accuracy of plane surfaces	gauge consisting of a scriber mounted on an adjustable stand; used to test the accuracy of plane surfaces