The homophone of need is knead.
Yes, surprisingly is spelled with an S. Surprisingly is how you spell it. You spelled it correctly.
An older word for a school principal is a headmaster or headmistress.
tense
You spelled it correctly in the question.
You have spelled both correctly in your question
Yes, if it is the infinitive of the verb (to choose). The past tense is spelled chose and the past participle is chosen. The verb "choose" is also a homophone of the verb conjugation "chews" (bites on).
Yes it is spelled correctly
The homophone of "thorough" is "thorough." This word does not have a homophone, as it is already spelled and pronounced uniquely.
You have spelled 'still' correctly.
The homophone for "rob" is "robb," which is pronounced the same but spelled differently.
The homophone of "burn" is "bern," which sounds the same but is spelled differently.
Would is a homophone of "wood"
The homophone for strait is "straight."
The homophone of "doe" is "dough."
The homophone for "finest" is "finest." This word does not have a different homophone as it is spelled and pronounced the same way.
The spelling "knight" is a medieval mounted or armored soldier, or the related honorary title. The homophone "night" is the period of daily darkness, as opposed to daytime.
A homophone is a word that is pronounced like another word, but is usually spelled differently. The words may be spelled the same, however, like rose and rose. Words that are spelled the same are called homographs and homonyms. If the words are spelled differently, the are also heterographs. A homophone for the word farrow could be Pharaoh, or Faro.