deary vs ducky

deary and ducky both are nouns.

Word	Noun	Adjective	Verb	Adverb
deary	Yes	No	No	No
ducky	Yes	No	No	No

As nouns, deary and ducky are synonyms defined as:

Other synonyms of deary include darling, dearie, favorite, favourite, pet.

deary (noun)	ducky (noun)
a special loved one	a special loved one
a beloved person; used as terms of endearment