Applies to nonhuman mammals: a state or period of heightened sexual arousal and activity.
synonyms: estrus, heat, rut.
Roget 374a:
sex,
sexuality,
gender;
male,
masculinity,
maleness
etc.
373;
female,
femininity
etc.
374.
sexual intercourse,
copulation,
mating,
coitus,
sex;
lovemaking,
marital relations,
sexual union;
sleeping together,
carnal knowledge.
sex instinct,
sex drive,
libido,
lust,
concupiscence;
hots,
horns [Coll.];
arousal,
heat,
rut,
estrus,
oestrus;
tumescence;
erection,
hard-on,
boner.
masturbation,
self-gratification,
autoeroticism,
onanism,
self-abuse.
orgasm,
climax,
ejaculation.
sexiness,
attractiveness;
sensuality,
voluptuousness.
[sexual intercourse outside of marriage]
fornication,
adultery.
[person who is sexy]
sex symbol,
sex goddess;
stud,
hunk.
one-night stand.
pornography,
porn,
porno;
hardcore pornography,
softcore pornography;
pin-up,
cheesecake;
beefcake;
[magazines with sexual photos],
Playboy,
Esquire,
Hustler.
[unorthodox sexual activity]
perversion,
deviation,
sexual abnormality;
fetish,
fetishism;
homosexuality,
lesbianism,
bisexuality;
sodomy,
buggery;
pederasty;
sadism.
masochism,
sado-masochism;
incest.
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Dutch: bronst
Polish: ruja, cieczka