admitted
The past tense of admit is admitted.
The past tense of have is had.
have in past tense is had
All three words, 'Spell past tense' are correctly spelled.
"Admin" isn't a verb in English. Perhaps the word should be "admit". If so, admitted is the past tense of admit.
You spell the past tense of settle like this: Settled
The past tense is fared.
The past tense is gardened.
The past tense is gassed.
The past tense is coasted.
The past tense is benefited.
The past tense is traveled.