un-come-at-able vs ungetatable

un-come-at-able and ungetatable both are adjectives.

Word	Noun	Adjective	Verb	Adverb
un-come-at-able	No	Yes	No	No
ungetatable	No	Yes	No	No

As adjectives, un-come-at-able and ungetatable are synonyms defined as:

Other synonyms of un-come-at-able include un-get-at-able.

un-come-at-able (adjective)	ungetatable (adjective)
difficult to reach or attain	difficult to reach or attain