Create a Formula where using different texts to display a value

I would like to create a formula that allows the destination cell display a number depending on a word that is typed in the source cell. The source cell and the destinating cell will remain the same two cells.

example:A2=IF(A1="WORD1",1.5,0)

If i type WORD1 in A1 (source cell) then A2 (destination cell) will display 1.5, but how do i make this formula work for a multiple of different words.

example:A2=IF(A1="WORD1",1.5,0 IF(A1="WORD2",3.0,0 IF(A1="WORD3",2.5,0)))

this formula doesn't work, but is basically what i am looking for the formula to do - WORD1 displays 1.5, WORD2 displays 3.0, WORD3 displays 2.5 etc where the source cell and the destinating cell remain the same two cells, it is just the word and its value that change

Thank You