elephantine vs gargantuan

elephantine and gargantuan both are adjectives.

Word	Noun	Adjective	Verb	Adverb
elephantine	No	Yes	No	No
gargantuan	No	Yes	No	No

As adjectives, elephantine and gargantuan are synonyms defined as:

Other synonyms of elephantine include giant, jumbo.

elephantine (adjective)	gargantuan (adjective)
of great mass; huge and bulky	of great mass; huge and bulky