ossified vs fossilised

ossified and fossilised both are adjectives.

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

As adjectives, ossified and fossilised are synonyms defined as:

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

Other synonyms of ossified include fossilized.

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