bulbous vs protuberant

bulbous and protuberant both are adjectives.

Word	Noun	Adjective	Verb	Adverb
bulbous	No	Yes	No	No
protuberant	No	Yes	No	No

As adjectives, bulbous and protuberant are synonyms defined as:

Other synonyms of bulbous include bellied, bellying, bulging, bulgy.

bulbous (adjective)	protuberant (adjective)
curving outward	curving outward
shaped like a bulb