In the first example to you mean words such as
arrow
away
kayak
I �m not sure about the second example. I don �t know of any words with /w, r, j/ immediately preceding a consonant. There would always be a vowel between the /w, r, l/ sound and the final consonant.
Are you able to give some examples of words for both of your word types?
Are you wanting to teach pronunciation of the /w, r, j/ sounds or spelling......?
/l/ is also a sound that has many of the same properties as /w, r, j/ . /w, r, l, j/ are all called glide sounds - they tend to "glide" into the vowel that follows them and are always followed by a vowel unless they �re in the final position of a word.