tuff

As an adjective tuff

is older and simplified spelling of tough.

As a noun tuff

is (rock) a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As adjectives the difference between tuff and false

is that tuff is older and simplified spelling of tough while false is (label) one of two states of a boolean variable; logic.

As a noun tuff

is (rock) a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

As nouns the difference between gravel and tuff

is that gravel is small fragments of rock, used for laying on the beds of roads and railroads, and as ballast while tuff is a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

As a verb gravel

is to apply a layer of gravel to the surface of a road, etc.

As an adjective tuff is

older and simplified spelling of tough.

As adjectives the difference between obligate and tuff

is that obligate is able to exist or survive only in a particular environment or by assuming a particular role while tuff is older and simplified spelling of tough.

As a verb obligate

is to bind, compel, constrain, or oblige by a social, legal, or moral tie.

As a noun tuff is

a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

As a proper noun strong

is .

As an adjective tuff is

older and simplified spelling of tough.

As a noun tuff is

(rock) a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

As nouns the difference between rhyolite and tuff

is that rhyolite is an igneous, volcanic (extrusive) rock, of felsic composition, with aphanitic to porphyritic texture while tuff is a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

As an adjective tuff is

older and simplified spelling of tough.

As adjectives the difference between tuff and pyroclastic

is that tuff is older and simplified spelling of tough while pyroclastic is (vulcanology) mostly composed of rock fragments of volcanic origin or comminuted during an eruption.

As nouns the difference between tuff and pyroclastic

is that tuff is (rock) a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel while pyroclastic is a rock mostly composed of rock fragments of volcanic origin.

As nouns the difference between tuff and truffle

is that tuff is (rock) a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel while truffle is any of various edible fungi, of the genus tuber , that grow in the soil in southern europe; the earthnut.

As an adjective tuff

is older and simplified spelling of tough.

As an adjective tuff

is older and simplified spelling of tough.

As a noun tuff

is (rock) a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

As a verb tugh is

thatch, cover.

As nouns the difference between teff and tuff

is that teff is a love grass, eragrostis tef , with small seeds, grown as a cereal and for forage in ethiopia and parts of arabia while tuff is (rock) a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel.

As an adjective tuff is

older and simplified spelling of tough.