crane fly vs daddy longlegs

crane fly and daddy longlegs both are nouns.

Word	Noun	Adjective	Verb	Adverb
crane fly	Yes	No	No	No
daddy longlegs	Yes	No	No	No

As nouns, crane fly and daddy longlegs are synonyms defined as:

crane fly and daddy longlegs: long-legged slender flies that resemble large mosquitoes but do not bite

crane fly (noun)	daddy longlegs (noun)
long-legged slender flies that resemble large mosquitoes but do not bite	long-legged slender flies that resemble large mosquitoes but do not bite
	spiderlike arachnid with a small rounded body and very long thin legs