The word teacher means "One who imparts knowledge/information to others". The antonym to that would be "one who takes knowledge away from others," for which there is not a word.
The word that you may be looking for is "Student" which is the opposite of teacher.
The word often is an antonym (opposite) of seldom, and has a silent 't'.
A teapot contains tea. The word teapot begins and ends with the letter t.
Teapot
A seven letter word that starts with D and ends with T: decrypt
An eight letter word that starts with S and ends with T: satiristshortestsmallestsmarteststagnantstalwartstiffeststridentsubtract
Tarantella is a 10 letter word. It begins with the letter T and ends with the letter A.
Some words do not have direct opposites [antonyms]. The word "but" has no antonym. (head) ↑ I am not sure why the word "head" is in brackets....if someone is indicating that "head" is an antonym for "but", they are incorrect. "Butt", as in derrière, is spelled with two "tt"s; "B-U-T-T"
The word bat starts with the latter b and it ends with the latter a and t
Quaint is a 6 letter word that begins with the letter q and ends with t.
A word that starts with w and ends with t is wit. -Tapasya Saikia, Dibrugarh, Assam, India
tegestologist
Terror is an antonym for fearlessness.