clump vs tuft

clump and tuft both are nouns.

Word	Noun	Adjective	Verb	Adverb
clump	Yes	No	Yes	No
tuft	Yes	No	No	No

As nouns, tuft is a hyponym of clump; that is, tuft is a word with a more specific, narrower meaning than clump:

Other hyponyms of clump include knot, swad, tussock.

clump (noun)	tuft (noun)
a heavy dull sound (as made by impact of heavy objects)	a bunch of feathers or hair
a grouping of a number of similar things	a bunch of hair or feathers or growing grass
a compact mass

clump (verb)	tuft (verb)
gather or cause to gather into a cluster
walk clumsily
come together as in a cluster or flock
make or move along with a sound as of a horse's hooves striking the ground