odd fellow vs queer bird

odd fellow and queer bird both are nouns.

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

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

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

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

odd fellow (noun)	queer bird (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