spasmodic laryngitis vs croup

spasmodic laryngitis and croup both are nouns.

Word	Noun	Adjective	Verb	Adverb
spasmodic laryngitis	Yes	No	No	No
croup	Yes	No	No	No

As nouns, spasmodic laryngitis and croup are synonyms defined as:

spasmodic laryngitis and croup: a disease of infants and young children; harsh coughing and hoarseness and fever and difficult breathing

spasmodic laryngitis (noun)	croup (noun)
a disease of infants and young children; harsh coughing and hoarseness and fever and difficult breathing	the part of an animal that corresponds to the human buttocks
	a disease of infants and young children; harsh coughing and hoarseness and fever and difficult breathing