texture vs grain

texture and grain both are nouns.

Word	Noun	Adjective	Verb	Adverb
texture	Yes	No	No	No
grain	Yes	No	Yes	No

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

texture: the characteristic appearance of a surface having a tactile quality
grain: the direction, texture, or pattern of fibers found in wood or leather or stone or in a woven fabric

Other hyponyms of texture include marbleisation, marbleising, marbleization, marbleizing.

As nouns, texture and grain are synonyms defined as:

texture and grain: the physical composition of something (especially with respect to the size and shape of the small constituents of a substance)

texture (noun)	grain (noun)
the feel of a surface or a fabric	the direction, texture, or pattern of fibers found in wood or leather or stone or in a woven fabric
the characteristic appearance of a surface having a tactile quality	the physical composition of something (especially with respect to the size and shape of the small constituents of a substance)
the musical pattern created by parts being played or sung together	the smallest possible unit of anything
the physical composition of something (especially with respect to the size and shape of the small constituents of a substance)	foodstuff prepared from the starchy grains of cereal grasses
the essential quality of something	a relatively small granular particle of a substance
	dry seed-like fruit produced by the cereal grasses: e.g. wheat, barley, Indian corn
	a cereal grass
	1/7000 pound; equals a troy grain or 64.799 milligrams
	1/60 dram; equals an avoirdupois grain or 64.799 milligrams
	a weight unit used for pearls or diamonds: 50 mg or 1/4 carat
	the side of leather from which the hair has been removed

texture (verb)	grain (verb)
	form into grains
	become granular
	thoroughly work in
	paint (a surface) to make it look like stone or wood