taste tester vs sampler

taste tester and sampler both are nouns.

Word	Noun	Adjective	Verb	Adverb
taste tester	Yes	No	No	No
sampler	Yes	No	No	No

As nouns, taste tester and sampler are synonyms defined as:

taste tester and sampler: someone who samples food or drink for its quality

Other synonyms of taste tester include taste-tester, taster.

taste tester (noun)	sampler (noun)
someone who samples food or drink for its quality	a piece of embroidery demonstrating skill with various stitches
	an observation station that is set up to make sample observations of something
	an assortment of various samples
	someone who samples food or drink for its quality