Strigous is a rarely used word with a meaning of having stiff, bristly hair. There are a few synonyms that can be used in place of this word. The most common one is the word bristly, which has a similar meaning of having rough, stiff hair. Another synonym could be the word spiky, which has a similar connotation of sharp hairs. Hirsute is also a synonym that describes a person or thing with a lot of hair, although it doesn't necessarily refer to the stiffness of the hair. Finally, wiry could also be used to describe hair that is stiff and thin, similar to strigous.