The homophone of need is knead.
Yes, surprisingly is spelled with an S. Surprisingly is how you spell it. You spelled it correctly.
tense
An older word for a school principal is a headmaster or headmistress.
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."
Yes, engineer is spelled correctly in your question.
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.