birdishness

As nouns the difference between terms and birdishness

is that terms is while birdishness is the quality of being birdish.

As an adjective birdish

is having similarities to a bird.

As a noun birdishness is

the quality of being birdish.

As nouns the difference between quality and birdishness

is that quality is (uncountable) level of excellence while birdishness is the quality of being birdish.

As an adjective quality

is being of good worth, well made, fit for purpose.