Spellings

Commentary is the correct spelling (option A), formed by adding '-ary' to 'comment' with no spelling changes. Options B, C, and D misspell by dropping letters or changing the ending.

Embarrass is the correct spelling with double 'r' and double 's'. It's commonly misspelled with missing letters. Option D uses a lowercase first letter, which is less standard for a standalone word choice.

Coincidence is the correct spelling. The prefix 'co-' (meaning together) is followed by 'incidence' (something that occurs). The common error is adding extra letters or misspelling the root.

Catamaran is a type of boat with twin hulls, from Tamil 'kattumaram'. The spelling has single 'a' between 't' and 'm', and single 'm' between 'a' and 'a'. Common errors involve doubling letters incorrectly.

Tomorrow is the correct spelling with double 'm' and double 'r'. The pattern follows 'to' + 'morrow' (morning). Many writers mistakenly add or omit letters.

Accommodate is the correct spelling with double 'c' and double 'm'. The word comes from Latin 'accommodare' and maintains both doubled consonants in English. All other options miss one or both required doublings.

The correct spelling is 'argument.' In English, when adding the suffix '-ment' to words ending in a silent 'e' after a consonant+u combination, the 'e' is dropped. So 'argue' becomes 'argument,' not 'arguement.' This follows the same pattern as 'true' becoming 'truth.'

The correct spelling is 'commitment.' The word comes from 'commit' + '-ment,' and the double 'm' from the root word is retained. Options A and D incorrectly use a single 'm,' while option B incorrectly uses three 'm's.

The correct spelling is 'consensus'. It is frequently misspelled as 'concensus' because people mistakenly associate it with 'census', but it actually derives from the Latin 'consentire' (to feel together).

Bougainvillaea is a flowering plant genus named after Louis Antoine de Bougainville. The correct spelling retains the 'ill' and double 'l' from 'Bougainville' plus 'aea'. Common misspellings drop letters or add extra consonants.

Coincidence comes from Latin 'coincidere' (fall upon together). The correct spelling has single 'i' after 'co-' and 'ence' ending. Common errors insert extra 'i's or use 'ance'.

Commemorate comes from Latin 'commemorare' (to remember together). It has double 'm' and single 'r'. Common errors insert extra letters or reverse the consonant pattern.

Crystallized comes from 'crystal' + '-ize' suffix. British/American English both double the 'l' when adding '-ed'. The 'y' changes to 'i'. Common errors use single 'l' or misspell the base.

Hospitable comes from Latin 'hospitabilis'. It has single 'p' and single 't' with '-able' suffix. Common misspellings insert extra consonants or use '-ible'.

Commentary comes from 'comment' + '-ary'. It keeps single 'm' from 'comment' and uses '-ary' suffix. Common errors drop the 't' or use '-ery' ending.