in love vs soft on

in love and soft on both are adjectives.

Word	Noun	Adjective	Verb	Adverb
in love	No	Yes	No	No
soft on	No	Yes	No	No

As adjectives, in love and soft on are synonyms defined as:

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

in love (adjective)	soft on (adjective)
marked by foolish or unreasoning fondness	marked by foolish or unreasoning fondness