erectile vs cavernous

erectile and cavernous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
erectile	No	Yes	No	No
cavernous	No	Yes	No	No

As adjectives, erectile and cavernous are synonyms defined as:

erectile and cavernous: filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood

erectile (adjective)	cavernous (adjective)
capable of being raised to an upright position	filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood
filled with vascular sinuses and capable of becoming distended and rigid as the result of being filled with blood	being or suggesting a cavern