Class and Senior class

Class noun - One of the segments of society into which people are grouped.

Senior class and class are semantically related. In some cases you can replace phrase "Senior class" with "Class", this terms are similar.

Nearby Words: classify, classification, classical, classed, classmate

Senior class noun - Final grade or class in high school or college.

Class and senior class are semantically related. You can use "Class" instead a noun phrase "Senior class".