fossilised vs fossilized

fossilised and fossilized both are adjectives.

Word	Noun	Adjective	Verb	Adverb
fossilised	No	Yes	No	No
fossilized	No	Yes	No	No

As adjectives, fossilised and fossilized are synonyms defined as:

fossilised and fossilized: set in a rigidly conventional pattern of behavior, habits, or beliefs

Other synonyms of fossilised include ossified.

fossilised (adjective)	fossilized (adjective)
set in a rigidly conventional pattern of behavior, habits, or beliefs	set in a rigidly conventional pattern of behavior, habits, or beliefs