sampler vs wine taster

sampler and wine taster both are nouns.

Word	Noun	Adjective	Verb	Adverb
sampler	Yes	No	No	No
wine taster	Yes	No	No	No

As nouns, wine taster is a hyponym of sampler; that is, wine taster is a word with a more specific, narrower meaning than sampler:

sampler (noun)	wine taster (noun)
a piece of embroidery demonstrating skill with various stitches	a taster who evaluates the quality of wines
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