in love vs potty

in love is not a noun while potty is a noun.

Word	Noun	Adjective	Verb	Adverb
in love	No	Yes	No	No
potty	Yes	Yes	No	No

As adjectives, in love and potty are synonyms defined as:

Other synonyms of in love include enamored, infatuated, smitten, soft on, taken with.

in love (noun)	potty (noun)
	a receptacle for urination or defecation in the bedroom
	a plumbing fixture for defecation and urination

in love (adjective)	potty (adjective)
marked by foolish or unreasoning fondness	slightly intoxicated
	marked by foolish or unreasoning fondness
	(British informal) trivial