queer duck vs odd fellow

queer duck and odd fellow both are nouns.

Word	Noun	Adjective	Verb	Adverb
queer duck	Yes	No	No	No
odd fellow	Yes	No	No	No

As nouns, queer duck and odd fellow are synonyms defined as:

queer duck and odd fellow: someone regarded as eccentric or crazy and standing out from a group

Other synonyms of queer duck include kook, odd fish, odd man out, queer bird.

queer duck (noun)	odd fellow (noun)
someone regarded as eccentric or crazy and standing out from a group	someone regarded as eccentric or crazy and standing out from a group