Blackbird is a nine letter animal. The third letter is the letter a.
Four letter words with X as the third letter:boxyfoxyluxenextpoxysexytaxitextwaxy
carpenter
territory
saucepans, tautology
7 letter word 3rd letter x
7 letter word 3rd letter x
Inception.
Words with X as the third letter:boxdexterityfaxfix, fixture, fixationfoxhexagonlaxloxluxurymaximummixnextnixpixiepoxysextaxtaxitexttoxictuxedowax
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern --X---XI-. That is, nine letter words with 3rd letter X and 7th letter X and 8th letter I. In alphabetical order, they are: saxitoxin
phlebitis
Chocolate