Spellings

Celestial is the correct spelling for the word relating to the sky or heavens. The key is remembering the single 'l' and 'e' before 's' - not double letters like in options A, B, or C. This word shares its root with 'celestial body' in astronomy.

Dizziness follows the standard rule for forming abstract nouns from adjectives ending in 'y' - keep the 'y' and add -ness (not -ness with letter changes). The root word 'dizzy' maintains its 'z' and 'y' pattern, unlike the misspelled options that drop letters or change the ending.

Perspective is the correct spelling - it means a particular way of viewing things or the art of drawing 3D scenes on 2D surfaces. Option A incorrectly doubles the 'p', option C has the 'e' and 'r' transposed, and option D substitutes 'a' for 'e'. The pattern is per-s-pec-tive.

Diligence means careful and persistent effort. The correct spelling keeps a single 'l' and uses the '-ence' suffix. Options B and D incorrectly double the 'l', while option C substitutes '-ance' for '-ence'. From the adjective 'diligent', replace 't' with 'ce' to form the noun.

Assessment is the correct spelling, requiring double 's' in both the prefix and the root. The pattern is as-sess-ment - the verb 'assess' (with double 's') plus '-ment'. Options A, C, and D all miss one of the double 's' letters, which is a common error in this frequently-used academic word.

Relevance is correctly spelled with '-ance' ending, not '-ence' as in option B. From the adjective 'relevant', change 't' to 'ce' but keep the 'an' vowel combination. Options C and D incorrectly change the vowel to 'a' in the first syllable. This word is commonly used in academic and business contexts.

Vaccination requires double 'c' followed by single 'i' and the standard '-tion' ending. From 'vaccine', add '-ation' while preserving the double 'c'. Option B misses a 'c', option C incorrectly adds an extra 'i', and option D makes both errors. This is a crucial medical term.

Ugliness follows the pattern for forming nouns from adjectives ending in 'y' - replace 'y' with 'i' and add '-ness'. The word 'ugly' becomes 'ugliness' (not 'uglness' or other variations). Options B, C, and D incorrectly handle this transformation by missing letters or adding extra 'e's.

The correct spelling is 'Cigarette' with 'cig-a-ret-te' structure. The other options show common misspellings: Ciggarette (double g), Cigarrette (double r), and Cigarete (missing t). This tests attention to detail and spelling accuracy.

'Abstinence' (D) is the correct spelling of the noun meaning self-restraint or voluntary forbearance from indulging in something. Options A, B, and C all misspell the word with extra or misplaced letters. The root is 'abstain' + suffix '-ence'.

The correct spelling is 'Acquaintance' with the pattern 'ac-' + 'quaintance'. The other options misspell it with doubled consonants in wrong positions.

The correct spelling is 'Successful' following the pattern 'success' + '-ful'. The suffix '-ful' always has one 'l' regardless of the base word.

The correct spelling is 'Arithmetic' with 'met' in the middle. It follows the pattern 'arith-' + 'metic', not 'matic'.

Referral is the correct spelling meaning the act of referring someone to another person or source. Refral, Referrel, and Refferal are common misspellings with incorrect letter placement or extra letters. The word comes from the root 'refer' with the suffix '-al'.

JORDAN is the correct spelling of the Middle Eastern country. The other options have common spelling errors: JORDUN (U instead of A), JOARDAN (OA instead of just O), and JORDAAN (extra A). This tests basic country spelling knowledge.