lemon curd vs preserves

lemon curd and preserves both are nouns.

Word	Noun	Adjective	Verb	Adverb
lemon curd	Yes	No	No	No
preserves	Yes	No	No	No

As nouns, preserves is a hypernym of lemon curd; that is, preserves is a word with a broader meaning than lemon curd:

lemon curd: a conserve with a thick consistency; made with lemons and butter and eggs and sugar
preserves: fruit preserved by cooking with sugar

Other hypernyms of lemon curd include conserve, conserves, preserve.

lemon curd (noun)	preserves (noun)
a conserve with a thick consistency; made with lemons and butter and eggs and sugar	fruit preserved by cooking with sugar