Spellings - 3

'Homoeopathy' (or 'Homeopathy') is the correct spelling of the alternative medical system based on the principle of 'like cures like' and using highly diluted substances. Options A, C, and D have incorrect letter placements or combinations. The spelling with 'oe' as in 'Homoeopathy' is the traditional British spelling, both 'Homoeopathy' and 'Homeopathy' are accepted variants.

Falconry is the correct spelling - it combines the base word 'falcon' with the suffix '-ry' denoting an art or practice. The other options either misspell 'falcon' or add incorrect endings.

Ruinous follows standard English spelling patterns by combining 'ruin' with the adjective suffix '-ous' meaning 'full of.' The other options incorrectly mutate the base word or use non-standard letter combinations.

Lingerie is a French loanword, so its spelling preserves the original 'ie' ending from the French language. The other options use phonetic approximations but incorrect letter combinations.

Lethal is the correct spelling meaning deadly or fatal. It derives from 'letum' (Latin for death) with the standard '-al' adjective suffix. The other options incorrectly swap vowels or letters.

Correct spelling is 'solitaire'.

Leverage is the correct spelling meaning to use something to advantage or borrowing to invest. It combines 'lever' with '-age' suffix. The other options incorrectly modify 'lever' or add an unnecessary 's'.

Courier is the correct spelling for a messenger who transports goods or documents. It comes from French 'courir' (to run) with the '-ier' suffix. The other options incorrectly swap or substitute vowels.

Tuition is the correct spelling for fee-based instruction. It derives from Latin 'tuitio' with standard '-ion' ending. The other options incorrectly modify vowels or the 'tion' pattern.

Solemn is the correct spelling meaning grave or serious. It comes from Latin 'solemnis' and has a silent 'n'. The other options add incorrect vowels or letters.

Riposte is the correct spelling for a quick, sharp retaliatory response or fencing counterattack. It's a French loanword with the 'post' ending. The other options use incorrect letter combinations.

Rouble is the correct spelling for the Russian monetary unit (also spelled ruble). The claimed correct answer uses the 'ou' variant. The other options have incorrect endings or vowels.

Option 2 is the correct spelling.

Tumbler is the correct spelling for a drinking glass or acrobat. It combines 'tumble' with the '-er' suffix indicating an agent or object. The other options incorrectly modify vowels or use 'a' instead of 'e'.