Maybe will we find this word as it is in our Dictionary? Of course, no.
The first thought here is that letter ה is the known article: the.
If so, what about the word חומר? Maybe we will find it in the Dictionary this way?
Unless we're using a highly special(ized) Dictionary, the answer is no.
What then? There are two chances:
1. You know the noun חֹמֶר
2. You do not know the noun חֹמֶר
--If you know this noun:
it is a noun ptr N-t128 that basically means four concepts: clay, tas, severity and jewel.
Within the meaning clay it means too matter, material, stuff.
--If you do not know this noun:
Namely we think that this is a I-type word, a word which inserted letter waw after its first root consonant.