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There are 14 words beginning with ULTRAF

ULTRAFAST	• ultrafast adj. Very fast, or of very short duration; especially concerning events that take place in femtosecond or… • ultra-fast adj. Alternative form of ultrafast. • ULTRAFAST adj. very fast.
ULTRAFINE	• ultrafine adj. (Of particles) Very fine. • ULTRAFINE adj. very very fine.
ULTRAFICHE	• ultrafiche n. An ultramicrofiche. • ULTRAFICHE n. a sheet of microfilm the same size as a microfiche but with a greater number of microcopied records on it.
ULTRAFICHES	• ultrafiches n. Plural of ultrafiche. • ULTRAFICHE n. a sheet of microfilm the same size as a microfiche but with a greater number of microcopied records on it.
ULTRAFILTER	• ultrafilter n. A device that performs ultrafiltration. • ultrafilter n. (Mathematics, of a set, whose subsets are partially ordered by inclusion) A proper filter which has… • ultrafilter n. (Mathematics, order theory) A filter (subset of a poset) that is maximal as a set with respect to the…
ULTRAFILTERS	• ultrafilters n. Plural of ultrafilter. • ULTRAFILTER v. to pass through an ultrafilter.
ULTRAFAMILIAR	• ultrafamiliar adj. Extremely familiar; particularly familiar. • ULTRAFAMILIAR adj. extremely familiar.
ULTRAFEMININE	• ultrafeminine adj. Highly feminine. • ULTRAFEMININE adj. extremely feminine.
ULTRAFILTERED	• ultrafiltered adj. Filtered using ultrafiltration. • ULTRAFILTER v. to pass through an ultrafilter.
ULTRAFILTRATE	• ultrafiltrate n. The filtrate produced by ultrafiltration. • ultrafiltrate v. To subject to ultrafiltration. • ULTRAFILTRATE n. a substance that has passed through an ultrafilter.
ULTRAFILTERING	• ultrafiltering v. Present participle of ultrafilter. • ULTRAFILTER v. to pass through an ultrafilter.
ULTRAFILTRATES	• ultrafiltrates n. Plural of ultrafiltrate. • ULTRAFILTRATE n. a substance that has passed through an ultrafilter.
ULTRAFASTIDIOUS	• ultrafastidious adj. Extremely fastidious. • ULTRAFASTIDIOUS adj. extremely fastidious.
ULTRAFILTRATION	• ultrafiltration n. Filtration through a semipermeable membrane that only allows small molecules through. • ULTRAFILTRATION n. filtration through a medium (as a semipermeable capillary wall) which allows small molecules (as of water) to pass but holds back larger ones (as of protein).

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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English Wiktionary: 61 words
Scrabble in French: 8 words
Scrabble in Spanish: no word
Scrabble in Italian: 5 words
Scrabble in German: no word
Scrabble in Romanian: 6 words

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