Table of Contents POS
HYPHEN
WORDNET DICTIONARY
CIDE DICTIONARY
THESAURUS
ROGET THESAURUS

WORDNET DICTIONARY

Noun fountainhead has 2 senses

• fountainhead(n = noun.communication) well, wellspring - an abundant source; "she was a well of information"
is a kind of source

• fountainhead(n = noun.location) head, headspring - the source of water from which a stream arises; "they tracked him back toward the head of the stream"
is a kind of beginning, origin, root, rootage, source

CIDE DICTIONARY

THESAURUS

fountainhead

font, fount, fountain, head, headspring, headstream, headwater, headwaters, inception, mainspring, mine, origin, provenance, provenience, quarry, riverhead, root, source, spring, springhead, well, wellhead, wellspring, whence

ROGET THESAURUS

fountainhead

Cause

N cause, origin, source, principle, element, occasioner, prime mover, primum mobile, vera causa, author, mainspring, agent, leaven, groundwork, foundation, spring, fountain, well, font, fountainhead, spring head, wellhead, fons et origo, genesis, descent, remote cause, influence, pivot, hinge, turning point, lever, crux, fulcrum, key, proximate cause, causa causans, straw that breaks the camel's back, ground, reason, reason why, why and wherefore, rationale, occasion, derivation, final cause, les dessous des cartes, undercurrents, rudiment, egg, germ, embryo, bud, root, radix radical, etymon, nucleus, seed, stem, stock, stirps, trunk, tap-root, gemmule, radicle, semen, sperm, nest, cradle, nursery, womb, nidus, birthplace, hotbed, causality, causation, origination, production, caused, causal, original, primary, primitive, primordial, aboriginal, protogenal, radical, embryonic, embryotic, in embryo, in ovo, seminal, germinal, at the bottom of, connate, having a common origin, because, behind the scenes, causa latet vis est notissima, felix qui potuit rerum cognoscere causas.

For further exploring for "fountainhead" in Webster Dictionary Online