| exacting(adjective, harsh, grim, painful, bleak) |
| experimental(adjective, useful, possible, functional, workable) |
| expressionless(adjective, response) |
| factual(adjective, unembellished, stoic) |
| feasible(adjective, factual, unembellished, stoic) |
| feelingless(adjective, unfeeling, hard-hearted, crass, nowhere) |
| ferocious(adjective, terrible, narrow) |
| fierce(adjective, terrible, narrow) |
| first-string(higher, upper, abovementioned) |
| first class(expression, higher, upper, abovementioned) |
| five-star(higher, upper, abovementioned) |
| flat(adjective, factual, unembellished, stoic) |
| flinty(adjective, authoritarian) |
| folksy(adjective, simple, unsophisticated, funky) |
| forbidding(adjective, indifferent, detached, distant, remote) |
| foregoing(higher, upper, abovementioned) |
| forerunning(higher, upper, abovementioned) |
| forgoing(adjective, quiet, restrained, subdued, unexcited) |
| former(higher, upper, abovementioned) |
| frigid(adjective, response) |