These words sometimes sound the same but have different meanings.

peak is the top of a mountain
peek is to look through a crevice
pique is to stimulate sonmeone’s interest

sense has to do with sensation
since has to do with a time in the past

spayed has to do with keeping the pet population down
spade is used for digging

tack is a small nail
tact is dealing with others in a sensitive manner
tacked is what you have done with a note and a small nail

tenant is an occupant of a building
tenet is a belief or principle