From identic + -al.

• IPA: /ɪˈdɛntɪkl̩/, /aɪˈdɛntɪkl̩/

identical

1. (not comparable) Bearing full likeness by having precisely the same set of characteristics; indistinguishable.
2. (not comparable) Not different or other; not another or others; not different as regards self; selfsame; numerically identical.
3. (not comparable, biology) Of twins, sharing the same genetic code.
4. (not comparable, mathematics) Exactly equivalent.
5. (comparable, rare) Approximating or approaching exact equivalence.

• (bearing full likeness) same
• (selfsame) same, selfsame
• (sharing same genetic code) monozygotic, monovular

• contrasting
• different
• distinct
• non-identical

• identify
• identity

• French: identique
• German: identisch
• Italian: identico
• Portuguese: idêntico
• Russian: иденти́чный
• Spanish: idéntico

• French: même, même, mêmes, identique
• Russian: иденти́чный

• French: monozygote, monovulaire, mono-ovulaire
• German: eineiig
• Italian: monovulari
• Russian: иденти́чный

• Russian: тожде́ственный

identical (plural identicals)

1. (usually, pluralized, chiefly, philosophy) Something which has exactly the same properties as something else.
2. An identical twin.
   • 2014, Robert S. Woodworth, Donald G. Marquis, Psychology (Psychology Revivals): A Study of Mental Life, page 171:

     Fraternal twins are boy-girl pairs as often as of the same sex, while identicals are necessarily of the same sex, […]

3. (poetry) A rhyme on the same syllable, such as "leave" and "believe".