different between nominoaccusative vs heteroclitic

English

nomino- +? accusative

nominoaccusative (not comparable)

(grammar) Of or pertaining to both the nominative and accusative cases at once, capable of conveying either the subject or direct object of the verb.

hetero- +? clitic.

heteroclitic (comparative more heteroclitic, superlative most heteroclitic)

(linguistics) In linguistics, particularly Indo-European Studies, signifying a stem which alternates between more than one form when declined for grammatical case. Examples of heteroclitic noun stems in Proto-Indo-European include *wod-r/n- "water" (nominoaccusative *wódr; genitive *udnés; locative *udén) and *yék^w-r/n- "liver" (nominoaccusative *yék^wr, genitive *ik^wnés). In Proto-Indo-European, heteroclitic stems tend to be noun stems with grammatically inanimate gender.
(microbiology) Pertaining to antibodies that react to a wide variety of antigens.

heteroclitic (plural heteroclitics)

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