topknotted vs crested

topknotted and crested both are adjectives.

Word	Noun	Adjective	Verb	Adverb
topknotted	No	Yes	No	No
crested	No	Yes	No	No

As adjectives, topknotted and crested are synonyms defined as:

topknotted and crested: (of a bird or animal) having a usually ornamental tuft or process on the head; often used in combination

Other synonyms of topknotted include tufted.

topknotted (adjective)	crested (adjective)
(of a bird or animal) having a usually ornamental tuft or process on the head; often used in combination	(of a knight's helmet) having a decorative plume
	(of a bird or animal) having a usually ornamental tuft or process on the head; often used in combination
	bearing an heraldic device