pickle vs sweet pickle

pickle and sweet pickle both are nouns.

Word	Noun	Adjective	Verb	Adverb
pickle	Yes	No	Yes	No
sweet pickle	Yes	No	No	No

As nouns, sweet pickle is a hyponym of pickle; that is, sweet pickle is a word with a more specific, narrower meaning than pickle:

Other hyponyms of pickle include gherkin, caper, dill pickle.

pickle (noun)	sweet pickle (noun)
vegetables (especially cucumbers) preserved in brine or vinegar	pickle cured in brine and preserved in sugar and vinegar
informal terms for a difficult situation

pickle (verb)	sweet pickle (verb)
preserve in a pickling liquid