Spellings

'Embarrass' is the correct spelling with double 'r' and double 's'. This follows the pattern where certain words double consonants. Options like 'embaras' or 'embarass' missing one of the doubled letters are incorrect.

'Conscious' is the correct spelling. It contains the sequence 'sc' followed by 'ious'. Options like 'conious', 'consios', or 'conscios' incorrectly modify the letter pattern or omit letters.

'Excise' is the correct spelling. This word refers to a tax or to remove something and follows standard English spelling patterns. Options like 'exise', 'exize', or 'excize' incorrectly modify the consonant pattern.

 The correct spelling is vacuum.

'Tuition' is the correct spelling with 'ui' representing the vowel sound. This relates to teaching or instruction. Options like 'tution', 'tuision', or 'tuiton' incorrectly modify the vowel pattern.

'Occurred' is the correct spelling with double 'c' but single 'r' at the end. This follows the pattern where the final consonant is not doubled when adding '-ed' to words ending in consonant-vowel-consonant where emphasis is not on the final syllable.

Correct spelling is twelfth.

'Sympathize' is the correct spelling in American English. The verb uses 'z' rather than 's' in this spelling convention. Options like 'sympathisee', 'sympathis', or 'sympathiz' are incorrect or incomplete.

Personnel is the correct spelling meaning staff or employees. It follows the pattern person + nel suffix. Personel is a common misspelling.

Hindrance is the correct spelling meaning something that hinders or obstructs. The pattern is hinder + ance. Avoid adding extra 'e' letters.

Cigarette is the correct spelling with double 't' and double 'e'. This follows French borrowing patterns where the final consonant is often doubled.

Fulfilled is the correct spelling from the root 'fulfill'. The past tense keeps the double 'l' from the base word. Don't add extra letters.

Waiter is the correct spelling for someone who serves food. It follows the pattern wait + er suffix. No need to change the spelling.

Poisonous is the correct spelling containing poison. The pattern is poison + ous. Keep the base word intact and add the suffix.

Museum is the correct spelling for an institution that cares for collections. It uses 'eu' for the 'you' sound, not 'ue' or 'uu'.