wanderlust vs itchy feet

wanderlust and itchy feet both are nouns.

Word	Noun	Adjective	Verb	Adverb
wanderlust	Yes	No	No	No
itchy feet	Yes	No	No	No

As nouns, wanderlust and itchy feet are synonyms defined as:

wanderlust and itchy feet: very strong or irresistible impulse to travel

wanderlust (noun)	itchy feet (noun)
very strong or irresistible impulse to travel	very strong or irresistible impulse to travel