there vs thither

there is a noun but thither is not a noun.

Word	Noun	Adjective	Verb	Adverb
there	Yes	No	No	Yes
thither	No	No	No	Yes

As adverbs, there and thither are synonyms defined as:

there (noun)	thither (noun)
a location other than here; that place; location, medial pronoun; demonstrative pronoun, location; quantifier: demonstrative determiner, distal; demonstrative pronoun, location; quantifier: demonstrative determiner, singular, distal

there (adverb)	thither (adverb)
in or at that place or location	to or toward that place; away from the speaker
to or toward that place; away from the speaker
in that matter; in that respect; on that point