A substitute foot with two accents is a spondee.
First of all, <u>a substitute foot is a metrical foot</u>, that is to say the basic rhythmic unit that is found in a line of verse in poetry. There are different types of feet, such as the iamb, the trochee, the anapest, the dactyl and the spondee; however, <u>the spondee is the only one that consists of two stressed syllables</u>. In other words, <u>the spondee is the only one that includes two accented syllables</u>: syllables that are pronounced louder, longer, and generally at a higher pitch than the rest of the syllables.