Spellings

"Interrogation" is the correct spelling. It features a double 'r' and the "-tion" suffix. Distractors fail by using a single 'r', double 't', or the "-sion" suffix.

"Obliterate" is the correct spelling. It follows the Latin root 'obliteratus'. Distractors add extra 'i's or change the 'e' to an 'a', which are common phonetic mistakes.

The verb 'persevere' ends in '-ere' and maintains this spelling pattern when converted to a noun. The correct spelling 'perseverance' has the middle 'e' before 'r' and ends with '-ance'. Options A, B, and C incorrectly swap or double letters.

"Tsunami" is the correct spelling, originating from Japanese. It begins with a silent 'T'. Distractors that omit the 'T' or add an 'e' at the end are incorrect.

"Dilemma" is the correct spelling. It contains a double 'm' but only a single 'l'. Common errors include doubling the 'l' or using a single 'm', as seen in the distractors.

"Affluence" is the correct spelling, meaning wealth. It uses the "-ence" suffix. Distractors add unnecessary 'i's or use the incorrect "-ense" or "-uense" endings.

'Controversy' is the correct spelling. The root is 'controversy' from Latin 'controversia.' Common misspellings include 'contraversy' (swapping v for first s), 'contrevarsy' (re + misspelling), and 'controvarsy' (double misspelling). The correct form keeps the 's' after 't' and 'v' in the middle.

'Competency' is correct. It follows the standard pattern: 'competent' → 'competency.' The suffix '-ency' is used with this root. Common errors include swapping 'e' and 'a' (competancy, compatancy) or inserting extra letters (compatency). The word relates to 'competence' and 'competent.'

"Routine" is the correct spelling. It follows the standard French-derived spelling used in English. Distractors use phonetic spellings like "Routeen" or incorrect vowel placements like "Routien."

"Insignia" is the correct spelling, derived from Latin. It requires the 'gn' combination to produce the 'ny' sound and ends in 'ia.' Distractors omit the 'g' or add an unnecessary 'e'.

"Discontinuance" is the correct spelling, ending in the suffix "-ance." Distractors incorrectly use "-anse," "-ence," or "-ense," which are common spelling mistakes for nouns derived from verbs ending in 'ue'.

"Philatelist" (a stamp collector) is correctly spelled with 'ph', an 'a' in the second syllable, and 'e' in the third. Distractors use 'f' or incorrect vowels like 'a' in the third syllable.

"Sophistication" is the correct spelling. It uses 'ph' for the 'f' sound and 'tion' for the suffix. Distractors use 'p' instead of 'ph' or 'sion' instead of 'tion,' which are common orthographic errors.

'Philadelphia' is the correct spelling - a proper noun, the city in Pennsylvania. Common errors include 'el' vs 'le' (Philadelfhia), missing 'l' (Philadelfia), or changing 'Ph' to 'F' (Filadelphia). The name comes from Greek and uses 'Ph' for the 'f' sound, with 'adelphia' meaning 'brotherly love.'

Latency is the correct spelling for a word meaning delay or lag, especially in technical contexts like computing. Latensie, Latencie, and Latensy are incorrect variations.