perching bird vs order Insessores

perching bird and order Insessores both are nouns.

Word	Noun	Adjective	Verb	Adverb
perching bird	Yes	No	No	No
order Insessores	Yes	No	No	No

As nouns, perching bird and order Insessores are synonyms defined as:

perching bird and order Insessores: a bird with feet adapted for perching (as on tree branches); this order is now generally abandoned by taxonomists

Other synonyms of perching bird include Insessores, percher.

perching bird (noun)	order Insessores (noun)
a bird with feet adapted for perching (as on tree branches); this order is now generally abandoned by taxonomists	a bird with feet adapted for perching (as on tree branches); this order is now generally abandoned by taxonomists