crammer vs tutor

crammer and tutor both are nouns.

Word	Noun	Adjective	Verb	Adverb
crammer	Yes	No	No	No
tutor	Yes	No	Yes	No

As nouns, tutor is a hypernym of crammer; that is, tutor is a word with a broader meaning than crammer:

Other hypernyms of crammer include coach, private instructor.

crammer (noun)	tutor (noun)
a textbook designed for cramming	a person who gives private instruction (as in singing, acting, etc.)
a special school where students are crammed
a student who crams
a teacher who is paid to cram students for examinations

crammer (verb)	tutor (verb)
	be a tutor to someone; give individual instruction
	act as a guardian to someone