acquaintance vs acquaintanceship

acquaintance and acquaintanceship both are nouns.

Word	Noun	Adjective	Verb	Adverb
acquaintance	Yes	No	No	No
acquaintanceship	Yes	No	No	No

As nouns, acquaintance and acquaintanceship are synonyms defined as:

acquaintance and acquaintanceship: a relationship less intimate than friendship

acquaintance (noun)	acquaintanceship (noun)
personal knowledge or information about someone or something	a relationship less intimate than friendship
a person with whom you are acquainted
a relationship less intimate than friendship