submerged vs subaqueous

submerged and subaqueous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
submerged	No	Yes	No	No
subaqueous	No	Yes	No	No

As adjectives, submerged and subaqueous are synonyms defined as:

Other synonyms of submerged include subaquatic, submersed, underwater.

submerged (adjective)	subaqueous (adjective)
beneath the surface of the water	growing or remaining under water
growing or remaining under water