If you commiserate with someone, you show them pity or sympathy because something bad or unpleasant has happened to them.
One thing that is incommensurate with another is different in its level, size, or quality from the second.
A compendium is a detailed collection of information on a particular or specific subject, usually in a book.
When you offer recompense to someone, you give them something, usually money, for the trouble or loss that you have caused them or as payment for their help.
If you are incompatible with someone, you do not get along or are unable to cooperate with that person; therefore, you are in conflict with them.
If you are being noncommittal on an issue, you are not revealing what your opinion is and are being reserved on purpose.
When you compel someone to do something, you force or drive them to do it.
A complement to something else finishes it or brings it into a fuller state.
A compilation is a gathering together of various different things gathered from many different sources.
A committee is a number of people who are part of a larger organization who meet to discuss important subjects, solve difficult problems, or make decisions.
When you show compassion to someone who is troubled, you take the time to listen to their problem and try to help them.
When two things combine, they come together or unite.
When you accompany another person, you go along with them as their friend or partner to do something, such as go for a walk.
A companion is a friend or buddy, that is, someone with whom you spend time doing things.
When you compare two things, you are finding out how they are similar and how they are different.
If you are complimentary towards someone, you say nice things to them, such as how intelligent they are or how beautiful they look.
Things that are compact take up a very small amount of space or are neatly packed together.
A competition is a contest, match, or game between people, each side of which tries its hardest to win.
If a reporter gives commentary about something, they are talking about it as it is happening, or they are discussing and giving their opinion about something that has already happened.
Differentiated vocabulary for your students is just a click away.