quadra

As nouns the difference between four and quadra

is that four is (countable) the digit or figure 4; an occurrence thereof while quadra is (architecture) the plinth, or lowest member, of any pedestal, podium, water table, or the like.

As a numeral four

is (cardinal) a numerical value equal to ; the number after three and before five; two plus two this many dots (••••).

As nouns the difference between quadrat and quadra

is that quadrat is an area of land, marked for studying its plants, animals, soil, natural processes, etc. While originally rectangular, modern quadrats can be rectangular, circular, irregular, etc. (e.g.: Krebs, C.J., 1999. Ecological Methodology. Addison-Welsey Educational Publishing, Inc., Menlo Park, California; Wheater, C.P., Bell, J.R., Cook, P.A., 2011. Practical Field Ecology: A Project Guide. John Wiley and Sons, Chichester, West Sussex, England. while quadra is the plinth, or lowest member, of any pedestal, podium, water table, or the like.

As nouns the difference between quadral and quadra

is that quadral is (grammar) a referring to four (or more) things while quadra is (architecture) the plinth, or lowest member, of any pedestal, podium, water table, or the like.

As an adjective quadral

is (grammar) referring to four (or more) things; of, in or relating to the grammatical number.