whalesucker vs whale sucker

whalesucker and whale sucker both are nouns.

Word	Noun	Adjective	Verb	Adverb
whalesucker	Yes	No	No	No
whale sucker	Yes	No	No	No

As nouns, whalesucker and whale sucker are synonyms defined as:

whalesucker and whale sucker: large blue Pacific remora that attaches to whales and dolphins

Other synonyms of whalesucker include Remilegia australis.

whalesucker (noun)	whale sucker (noun)
large blue Pacific remora that attaches to whales and dolphins	large blue Pacific remora that attaches to whales and dolphins