tit vs Parus caeruleus

tit and Parus caeruleus both are nouns.

Word	Noun	Adjective	Verb	Adverb
tit	Yes	No	No	No
Parus caeruleus	Yes	No	No	No

As nouns, Parus caeruleus is a hyponym of tit; that is, Parus caeruleus is a word with a more specific, narrower meaning than tit:

tit: small insectivorous birds
Parus caeruleus: widely distributed European titmouse with bright cobalt blue wings and tail and crown of the head

tit (noun)	Parus caeruleus (noun)
small insectivorous birds	widely distributed European titmouse with bright cobalt blue wings and tail and crown of the head
either of two soft fleshy milk-secreting glandular organs on the chest of a woman
the small projection of a mammary gland