dragon, sea-monster, serpent, whale

Strong’s Dictionary of Hebrew Words:

Transliteration:
tanniyn
Phonic:
tan-neen’
Meaning:
or tanniym (Ezek. 29:3) {tan-neem'}; intensive from the same as 8565; a marine or land monster, i.e. sea-serpent or jackal
KJV Usage:
dragon, sea-monster, serpent, whale