taste tester vs taster

taste tester and taster both are nouns.

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

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

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

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

taste tester (noun)	taster (noun)
someone who samples food or drink for its quality	someone who samples food or drink for its quality