Insect and Orthopteran

Insect noun - A person of no importance or influence.

Orthopteran and insect are semantically related. In some cases you can replace term "Orthopteran" with "Insect", this nouns are similar.

Orthopteran noun - Any of various insects having leathery forewings and membranous hind wings and chewing mouthparts.

Insect and orthopteran are semantically related. You can use "Insect" instead a noun "Orthopteran".