taste-tester vs taste tester

taste-tester and taste tester both are nouns.

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

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

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

Other synonyms of taste-tester include sampler, taster.

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