synesthetic vs synaesthetic

synesthetic and synaesthetic both are adjectives.

Word	Noun	Adjective	Verb	Adverb
synesthetic	No	Yes	No	No
synaesthetic	No	Yes	No	No

As adjectives, synesthetic and synaesthetic are synonyms defined as:

synesthetic and synaesthetic: relating to or experiencing synesthesia; involving more than one sense

synesthetic (adjective)	synaesthetic (adjective)
relating to or experiencing synesthesia; involving more than one sense	relating to or experiencing synesthesia; involving more than one sense