grout

As a noun grout

is a thin mortar used to fill the gaps between tiles and cavities in masonry.

As a verb grout

is to insert mortar between tiles.

As an adjective ungrouted is

not grouted.

As nouns the difference between grout and rubblework

is that grout is a thin mortar used to fill the gaps between tiles and cavities in masonry while rubblework is a form of masonry made of large stones loosely thrown together and then optionally grouted.

As a verb grout

is to insert mortar between tiles.

As verbs the difference between grout and regrout

is that grout is to insert mortar between tiles while regrout is to grout again.

As a noun grout

is a thin mortar used to fill the gaps between tiles and cavities in masonry.