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