Synonyms of the word 
CETACEOUS → CETACEAN
cetaceous
- adj. Relating to whales or more generally to any marine mammal of the order Cetacea.
cetacean
- adj. Pertaining to the zoologic order Cetacea, or associated with species falling under that taxonomic hierarchy.
- adj. More generally, relating to large aquatic mammals, either directly or by analogy.
- n. An animal belonging to the order Cetacea, including dolphins, porpoises, and whales.
If you are interested in words, visit the following sites :
- wiktionary.org/cetaceous For complete definition of a word
- 1word.ws/cetaceous to play with words, suffixs, prefixs, etc.