According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern ---HY---M. That is, nine letter words with 4th letter H and 5th letter Y and 9th letter M. In alphabetical order, they are:

lathyrism

pachyderm

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern L-T-----M. That is, nine letter words with 1st letter L and 3rd letter T and 9th letter M. In alphabetical order, they are:

lathyrism

literatim

liturgism

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -A--YR-S-. That is, nine letter words with 2nd letter A and 5th letter Y and 6th letter R and 8th letter S. In alphabetical order, they are:

lathyrism

martyrise

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 16 words with the pattern ---H---SM. That is, nine letter words with 4th letter H and 8th letter S and 9th letter M. In alphabetical order, they are:

authorism

bashawism

dichroism

dithelism

euphemism

euphonism

gothicism

hyphenism

lathyrism

lichenism

mechanism

mephitism

methodism

mythicism

nephalism

orphanism

vegetables would be a dangerously misleading answer because sweet peas are famously perfumed flowers grown in most temperate climates round the world but their seeds are poisonous - causing a serious disease called lathyrism. For this reason it is irresponsible to call anything else sweet peas. Sweet pea seeds are like culinary peas and grow with up to 14 in a pod - just smaller in size.