• wnd matter,
• snd matter,
• dnd matter,
• rnd matter,
• 4nd matter,
• 3nd matter,
• ebd matter,
• emd matter,
• ejd matter,
• ehd matter,
• ens matter,
• enx matter,
• enc matter,
• enf matter,
• enr matter,
• ene matter,
• end natter,
• end katter,
• end jatter,
• end mztter

The adjective form of "end matter" is "end-matter".

The plural form of "end matter" is "end matters"

The singular form of the word "end matter" is "end matter". The word "end matter" generally refers to the supplementary material or content that appears at the end of a book or publication. It is typically used in its plural form.